Physics past questions: JAMB UTME 2024

124 objective questions, with answers. Free to read and practise.

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124 questions, one at a time, marked as you go or at the end. No account needed.

1.
5 X 10 \(^{-3}\) kg of liquid at its boiling point is evaporated in 20s by the heat generated by a resistor of 2 \(\Omega\) when a current of 10A is used. The specific latent heat of vaporization of the liquid is
1. A.8.0 x 10 \(^4\) Jkg \(^{-1}\)
2. B.8.0 x 10 \(^5\) Jkg \(^{-1}\)
3. C.8.0 x 10 \(^6\) Jkg \(^{-1}\)
4. D.8.0 x 10 \(^7\) Jkg \(^{-1}\)
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Answer: B 8.0 x 10 \(^5\) Jkg \(^{-1}\)
2.
A blacksmith heated a metal whose cubic expansivity is 3.9 x 10 \(^{-6}\) K \(^{-1}\) . Calculate the area expansivity.
1. A.3.9 x 10 \(^{-6}\) K \(^{-1}\)
2. B.2.6 x 10 \(^{-6}\) K \(^{-1}\)
3. C.1.3 x 10 \(^{-6}\) K \(^{-1}\)
4. D.1.6 x 10 \(^{-6}\) K \(^{-1}\)
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Answer: B 2.6 x 10 \(^{-6}\) K \(^{-1}\)
3.
A body is pulled on a horizontal surface with a rope inclined at 30º to the vertical. If the effective force pulling the body along the horizontal surface is 15N, calculate the tension on the rope.
1. A.30N
2. B.60N
3. C.22.5N
4. D.75N
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Answer: A 30N
4.
A body is whirled in a horizontal circle at the rate of 800 revolutions per minute. Determine the angular velocity
1. A.100 \(\pi\) rads \(^{-1}\)
2. B.33.3 \(\pi\) rads \(^{-1}\)
3. C.29.5 \(\pi\) rads \(^{-1}\)
4. D.26.7 \(\pi\) rads \(^{-1}\)
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Answer: D 26.7 \(\pi\) rads \(^{-1}\)
5.
A boy standing 408m from a wall blew a trumpet and heard the echo 2.4s later. Calculate the speed of the sound
1. A.310m/s
2. B.320m/s
3. C.330m/s
4. D.340m/s
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Answer: D 340m/s
6.
A cell of internal resistance of 2 \(\Omega\) supplies current through a resistor, X if the efficiency of the cell is 75%, find the value of X.
1. A.2 \(\Omega\)
2. B.4 \(\Omega\)
3. C.6 \(\Omega\)
4. D.8 \(\Omega\)
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Answer: C 6 \(\Omega\)
7.
A force of 10N extends a spring of natural length 1m by 0.02m, calculate the length of the spring when the applied force is 40N.
1. A.0.08m
2. B.0.09m
3. C.1.08m
4. D.1.80m
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Answer: C 1.08m
8.
A hydrometer of mass y kg and volume 2y x 10 \(^{-5}\) m \(^3\) floats in a fluid with 20% of its volume above the fluid, what is the density of the fluid?
1. A.6.22 x 10 \(^4\) kgm \(^{-3}\)
2. B.6.23 x 10 \(^4\) kgm \(^{-3}\)
3. C.6.24 x 10 \(^4\) kgm \(^{-3}\)
4. D.6.25 x 10 \(^4\) kgm \(^{-3}\)
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Answer: D 6.25 x 10 \(^4\) kgm \(^{-3}\)
9.
A light ray passing from air into water at an angle of 30º from the normal in air would
1. A.make an angle greater than 30 \(^0\) in water surface
2. B.be completely absorbed by the water surface
3. C.be completely reflected by the water surface
4. D.make an angle less than 30 \(^0\) from the normal in water
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Answer: B be completely absorbed by the water surface
10.
A load of 300N is to be lifted by a machine with a velocity ratio of 2 and an efficiency of 60%. What effort will be applied to lift the load?
1. A.100N
2. B.150N
3. C.250N
4. D.400N
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Answer: C 250N
11.
A mass of gas at 40mmHg is heated from 298k to 348k at constant volume. Cal the pressure exerted by the gas.
1. A.50.21mmHg
2. B.46.71mmHg
3. C.42.35mmHg
4. D.35.12mmHg
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Answer: B 46.71mmHg
12.
A monochromatic light is one that
1. A.can undergo dispersion
2. B.cannot be refracted
3. C.has one wavelength
4. D.has many wavelength
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Answer: A can undergo dispersion
13.
A particular household utilizes three electrical appliances for six hours daily if the appliances are rated 80W, 100W, and 120W respectively. Calculate the electrical bills paid monthly if an average month is 31 days. [1kwh = #24.08k]
1. A.₦ 2843.22k
2. B.₦ 1950.22k
3. C.₦ 1343.66k
4. D.₦ 46.23k
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Answer: C ₦ 1343.66k
14.
A practical application of total internal reflection is found in
1. A.rainbow
2. B.diverging lens
3. C.converging lens
4. D.fiber optics
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Answer: D fiber optics
15.
A rectifier is a device that changes
1. A.D.C to D.C
2. B.D.C to A.C
3. C.A.C to A.C
4. D.A.C to D.C
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Answer: D A.C to D.C
16.
A red shirt under a red light appears pale because red
1. A.reflects nearly all light falling on it
2. B.Unable to reflect lights falling on it
3. C.absorbs all lights falling on it
4. D.absorbs other colours and reflects red
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Answer: D absorbs other colours and reflects red
17.
A refrigerator uses 150W. If it is kept on for 336 hours non-stop, what is the energy consumed in KWh?
1. A.60.20KWh
2. B.50.40KWh
3. C.25.01KWh
4. D.30.20KWh
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Answer: B 50.40KWh
18.
A solid cube of aluminum is 1.5cm on each edge. The density of aluminum is 2700kgm \(^{-1}\) . Find the mass of the cube.
1. A.7.5g
2. B.9.1g
3. C.12.0g
4. D.15.0g
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Answer: B 9.1g
19.
A sonometer's fundamental note is 50Hz, what is the new frequency when the tension is four times the original?
1. A.25Hz
2. B.100Hz
3. C.200Hz
4. D.250Hz
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Answer: B 100Hz
20.
A thick glass tumbler cracks when boiling water is poured into it because
1. A.The inside expands more rapidly than the outside
2. B.The inside expands less rapidly than the outside
3. C.The expansion is even
4. D.It does not expand
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Answer: B The inside expands less rapidly than the outside
21.
A wheelbarrow inclined at 60º to the horizontal is pushed with a force of 150N. What is the horizontal component of the applied force
1. A.130N
2. B.75N
3. C.60N
4. D.50N
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Answer: B 75N
22.
According to kinetic theory of gases, the pressure exerted by the gas on the wall is equal
1. A.change in momentum per unit volume
2. B.rate of change of momentum imparted by the walls per second per unit area
3. C.momentum imparted to the walls per unit area
4. D.change in momentum imparted to the walls per unit area
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Answer: D change in momentum imparted to the walls per unit area
23.
An accumulator is 90% efficient. If it gives out 2700J of energy while discharging, how much energy does it take in?
1. A.3600J
2. B.3000J
3. C.3200J
4. D.2430J
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Answer: B 3000J
24.
An air force jet flying with a speed of 335m/s went past an anti-aircraft gun. How far is the aircraft 5s later when the gun was fired?
1. A.838m
2. B.1675m
3. C.670m
4. D.3350m
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Answer: B 1675m
25.
An effort of 40N is applied on a machine to lift a mass of 60kg. Determine the mechanical advantage of the machine [ g = 10ms \(^2\) ]
1. A.2400
2. B.240
3. C.150
4. D.15
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Answer: D 15
26.
An electron falls from an energy level of -5.44eV to another energy level, E. If the emitted photon is of wavelength 5.68 x 10 \(^{-6}\) m, calculate the energy change. [ Plank's constant = 6.63 x 10 \(^{-34}\) Js, emitted radiation speed = 3.0 x 10 \(^8\) ms \(^{-1}\) ]
1. A.1.49 x 10 \(^{-20}\) J
2. B.1.49 x 10 \(^{-19}\) J
3. C.3.49 x 10 \(^{-20}\) J
4. D.3.49 x 10 \(^{-19}\) J
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Answer: B 1.49 x 10 \(^{-19}\) J
27.
An example of a non-rechargeable cell is
1. A.nickel iron
2. B.mercury cadmium
3. C.dry leclanche
4. D.lead-acid
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Answer: C dry leclanche
28.
An ideal transformer has
1. A.Maximum primary resistance
2. B.No flux leakage
3. C.Hysteresis
4. D.Eddy current
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Answer: B No flux leakage
29.
An object is placed 25cm in front of a convex mirror has its image formed 5cm behind the mirror. what is the focal length of the convex mirror
1. A.8.20cm
2. B.6.25cm
3. C.5.60cm
4. D.4.50cm
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Answer: B 6.25cm
30.
As per Faraday's laws of electromagnetic induction, an e.m.f is induced in a conductor whenever
1. A.lies parallel to the magnetic flux
2. B.lies in a magnetic field
3. C.lies out side but close to a magnetic field
4. D.cuts magnetic flux
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Answer: C lies out side but close to a magnetic field
31.
At a pressure of 10 \(^5\) Nm \(^{-2}\) , a gas has a volume of 20m \(^3\) . Calculate the volume at 4 x 10 \(^5\) Nm \(^{-2}\) at constant temperature.
1. A.2m \(^3\)
2. B.3m \(^3\)
3. C.4m \(^3\)
4. D.5m \(^3\)
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Answer: D 5m \(^3\)
32.
At absolute zero temperature, the average velocity of the molecules
1. A.Decreases
2. B.Increases
3. C.Is zero
4. D.Is uncertain
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Answer: C Is zero
33.
Bifocal lens is used to correct the eye defect of
1. A.astigmatism
2. B.hypermatropia
3. C.myopia
4. D.presbyopia
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Answer: D presbyopia
34.
Calculate the depth of a swimming pool if the apparent depth is 10cm. ( Refractive index of water = 1.33 )
1. A.7.5cm
2. B.10.0cm
3. C.13.3cm
4. D.6.87cm
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Answer: C 13.3cm
35.
Calculate the magnetic force on an electron in a magnetic field of flux density 10T, with a velocity of 3 x 10 \(^7\) m/s at 60º to the magnetic field (e = 1.6 x 10 \(^{-19}\) C)
1. A.4.8 x 10 \(^{-11}\) N
2. B.4.6 x 10 \(^{-12}\) N
3. C.4.16 x 10 \(^{-11}\) N
4. D.4.3 x 10 \(^{-11}\) N
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Answer: C 4.16 x 10 \(^{-11}\) N
36.
Calculate the power of an object which moves through a distance of 500cm in 1s on a frictionless surface by a horizontal force of 50N
1. A.200W
2. B.300W
3. C.350W
4. D.250W
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Answer: D 250W
37.
Calculate the quantity of heat for copper rod whose thermal capacity is 400Jk \(^{-1}\) for a temperature change of 60ºC to 80ºC
1. A.2KJ
2. B.4KJ
3. C.6KJ
4. D.8KJ
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Answer: B 4KJ
38.
Calculate the upthrust on a spherical ball of volume 4.2 x 10 \(^{-4}\) m \(^{3}\) when totally immersed in a liquid of density 1028kgm \(^{-3}\)
1. A.5.2N
2. B.4.3N
3. C.3.0N
4. D.2.4N
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Answer: B 4.3N
39.
Calculate the value of electric field intensity due to a charge of 4μC if the force due to the charge is 8N
1. A.2.0 x 10 \(^6\) NC \(^{-1}\)
2. B.3.0 x 10 \(^6\) NC \(^{-1}\)
3. C.4.0 x 10 \(^6\) NC \(^{-1}\)
4. D.8.0 x 10 \(^6\) NC \(^{-1}\)
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Answer: A 2.0 x 10 \(^6\) NC \(^{-1}\)
40.
Convert 60ºC to degree Fahrenheit
1. A.111.15 \(^0\) F
2. B.115.56 \(^0\) F
3. C.132.23 \(^0\) F
4. D.140.00 \(^0\) F
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Answer: D 140.00 \(^0\) F
41.
Electrolysis can be investigated using
1. A.Voltmeter
2. B.Ammeter
3. C.Galvanometer
4. D.Voltameter
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Answer: D Voltameter
42.
Find the amount of current required to deposit 0.02kg of metal in a given electrolysis for 120 seconds. [electro chemical equivalent of the metal = 1.3 x 10 \(^{-7}\) kgC \(^{-1}\) ]
1. A.7.8 x 10 \(^{-4}\) A
2. B.7.8 x 10 \(^{-2}\) A
3. C.1.3 x 10 \(^3\) A
4. D.1.3 x 10 \(^5\) A
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Answer: C 1.3 x 10 \(^3\) A
43.
Find the value of a capacitor with voltage 5V and 30C.
1. A.7f
2. B.6f
3. C.15f
4. D.0.17f
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Answer: B 6f
44.
How much joules of heat are given out when a piece of iron, of mass 60g and specific heat capacity 460JKg \(^{-1}\) K \(^{-1}\) , cools from 75ºC to 35ºC
1. A.1000J
2. B.1050J
3. C.1067J
4. D.1104J
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Answer: D 1104J
45.
I clear II sharp III poor IV dark Which of the above happens when the hole of a pinhole camera is diminished?
1. A.I only
2. B.II only
3. C.I and II only
4. D.III and IV only
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Answer: B II only
46.
I It wets glass II It needs to be coloured III It has a low density Water is not suitable for use as a thermometric liquid because
1. A.I only
2. B.I and II only
3. C.I, II, and III only
4. D.II and III only
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Answer: C I, II, and III only
47.
If a body in linear motion changes from point P to Q, the motion is
1. A.Translational
2. B.Rotational
3. C.Simple harmonic
4. D.Circular
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Answer: A Translational
48.
If a charge ion goes through a combined electric field E and magnetic field B, the resultant emergent velocity of the ion is
1. A.\(\frac{E}{B}\)
2. B.EB
3. C.\(\frac{B}{E}\)
4. D.E-B
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Answer: A \(\frac{E}{B}\)
49.
If a sheet of an insulating material is inserted between the plates of an air capacitor, the capacitance will
1. A.become zero
2. B.decrease
3. C.increase
4. D.remain unchanged
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Answer: C increase
50.
If the displacement of a car is proportional to the square of time, then the car is moving with
1. A.Uniform acceleration
2. B.Uniform velocity
3. C.Increasing acceleration
4. D.Decreasing acceleration
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Answer: A Uniform acceleration
51.
If the pressure on an enclosed gas is doubled and its temperature rises from 27ºC to 127ºC, then its volume will
1. A.increase by \(\frac{2}{3^{rd}}\)
2. B.increase by \(\frac{1}{3^{rd}}\)
3. C.decrease by \(\frac{2}{3^{rd}}\)
4. D.decrease by \(\frac{1}{3^{rd}}\)
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Answer: D decrease by \(\frac{1}{3^{rd}}\)
52.
If the rate of evaporation is y, and the rate of condensation is x, then, a vapour is saturated when
1. A.x > y
2. B.x
3. C.x = y
4. D.x \(\leq\) y
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Answer: C x = y
53.
If the S.V.P of water vapour was 13.5mmHg at 33ºC and 7.3mmHg at 7ºC. Find the percentage relative of the air on a day when average air temperature was 33ºC and dew point was 7ºC.
1. A.55%
2. B.60%
3. C.54%
4. D.51%
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Answer: C 54%
54.
If the velocity ratio of a machine is 4, what does it mean?
1. A.Load and the effort are equal
2. B.Distance moved by effort is 4 times greater than the distance moved by load
3. C.The efficiency is low
4. D.The load is greater than the effort
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Answer: B Distance moved by effort is 4 times greater than the distance moved by load
55.
In a Hare's apparatus, the height of water and a liquid X are 0.3m and 0.5m respectively. The relative density of x is?
1. A.0.4
2. B.0.6
3. C.1.7
4. D.2.0
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Answer: B 0.6
56.
In a series resonant circuit, the current flowing in the circuit is
1. A.maximum
2. B.minimum
3. C.zero
4. D.unaffected
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Answer: A maximum
57.
In a solar panel, solar beam is concentrated by using
1. A.Concave mirror
2. B.Convex mirror
3. C.Plane mirror
4. D.Triangular mirror
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Answer: A Concave mirror
58.
In electrolysis, when same quantity of electricity is passed through different electrolytes, mass of substances deposited is proportional to
1. A.Molecular weight
2. B.Chemical equivalent
3. C.Atomic number
4. D.Chemical equivalent per valency
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Answer: B Chemical equivalent
59.
In the diagram above, the galvanometer is converted to
1. A.Voltmeter
2. B.Ammeter
3. C.Voltameter
4. D.Hypsometer
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Answer: B Ammeter
60.
In voltage measurement, the potentiometer is preferred to voltmeter because it
1. A.has a wider range
2. B.consumes negligible current
3. C.is bulky
4. D.responds faster than voltmeter
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Answer: B consumes negligible current
61.
Infra-red thermometers work by detecting the
1. A.radiation from the body and converting it to temperature
2. B.conduction of heat from the body
3. C.convective air pulse from the body
4. D.absorption of heat by the body
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Answer: A radiation from the body and converting it to temperature
62.
Newton's law of cooling is valid only for a
1. A.small temperature range
2. B.large temperature range
3. C.free flow range
4. D.presence of heat source
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Answer: B large temperature range
63.
One of these is not the use of an electroscope
1. A.testing the type of charge on a charge body
2. B.measuring ionization current in air
3. C.detecting the pressure of charge on a charged body
4. D.producing electric charge in a body
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Answer: D producing electric charge in a body
64.
Photometer is used to measure
1. A.Kinetic energy of liberated electrons
2. B.Intensity of light
3. C.frequency of light
4. D.wavelength of light
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Answer: B Intensity of light
65.
Pilots uses aneroid barometer to know the height above sea level because
1. A.Very accurate
2. B.Small and convenient
3. C.Heavy and huge
4. D.Costly
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Answer: B Small and convenient
66.
Rainbow is formed when sunlight undergoes
1. A.reflection
2. B.refraction
3. C.dispersion
4. D.diffraction
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Answer: C dispersion
67.
The acceleration of a free fall due to gravity is not a constant everywhere on the Earth's surface because
1. A.mass of the earth
2. B.elliptical shape of the earth
3. C.variation in the density of the earth
4. D.rotation of the earth about its axis
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Answer: A mass of the earth
68.
The average translational kinetic energy of gas molecules depends on
1. A.Temperature only
2. B.Number of moles and temperature
3. C.Pressure and temperature
4. D.Pressure only
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Answer: A Temperature only
69.
The bursting of water pipes during very cold weather, when the water in the pipes form ice could be attributed to
1. A.contraction of pipes when cooled
2. B.expansion of water on freezing
3. C.contraction of water on freezing
4. D.expansion of ice on melting
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Answer: B expansion of water on freezing
70.
The capacitance of a capacitor, C, is inversely proportional to
1. A.area of the plate
2. B.dielectric substance
3. C.distance between plate
4. D.direction of the plate
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Answer: C distance between plate
71.
The charge of magnitude 1.6 x 10 \(^{-19}\) C is placed in a uniform electric field of intensity 1200Vm \(^{-1}\) . Calculate its acceleration, if the mass of the charge is 9.1 x 10 \(^{-31}\) kg
1. A.2.11 x 10 \(^{14}\) ms \(^{-2}\)
2. B.2.11 x 10 \(^{13}\) ms \(^{-2}\)
3. C.1.20 x 10 \(^{14}\) ms \(^{-2}\)
4. D.1.20 x 10 \(^{13}\) ms \(^{-2}\)
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Answer: A 2.11 x 10 \(^{14}\) ms \(^{-2}\)
72.
The defect of the eye lens which occurs when the ciliary muscles are weak is
1. A.Spherical aberration
2. B.Astigmatism
3. C.Presbyopia
4. D.Myopia
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Answer: D Myopia
73.
The degree of precision of a vernier caliper is
1. A.0.005cm
2. B.0.01cm
3. C.0.1cm
4. D.1.0cm
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Answer: B 0.01cm
74.
The device for measuring the angle of dip is
1. A.Dip circle
2. B.Dip inclination
3. C.Dip variation
4. D.Dip meter
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Answer: A Dip circle
75.
The diaphragm in the camera is similar to what part of the eyes?
1. A.Cornea
2. B.Lens
3. C.Ciliary muscle
4. D.Iris
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Answer: D Iris
76.
The dimension of power is
1. A.ML \(^2\) T \(^{-3}\)
2. B.ML \(^1\) T \(^2\)
3. C.ML \(^2\) T \(^{-2}\)
4. D.MLT \(^2\)
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Answer: D MLT \(^2\)
77.
The dimension of young's modulus,E is given by
1. A.MLT \(^{-1}\)
2. B.MT \(^{-2}\)
3. C.ML \(^{-1}\) T \(^{-2}\)
4. D.M \(^{-1}\) T
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Answer: A MLT \(^{-1}\)
78.
The distance between two successive crests of a water wave is 0.25m. If a particle on the surface of the water makes four complete vertical oscillations in one second. Calculate the speed of the wave.
1. A.4ms \(^{-1}\)
2. B.3ms \(^{-1}\)
3. C.2ms \(^{-1}\)
4. D.1ms \(^{-1}\)
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Answer: D 1ms \(^{-1}\)
79.
The efficiency of a cell with internal resistance of 2 \(\Omega\) supply current to a 6 \(\Omega\) resistor is
1. A.25%
2. B.50%
3. C.65%
4. D.75%
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Answer: D 75%
80.
The energy in a moving car is an example of
1. A.Mechanical energy
2. B.Electrical energy
3. C.Potential energy
4. D.Kinetic energy
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Answer: D Kinetic energy
81.
The energy of light of frequency 2.0 x 10 \(^{15}\) Hz is (h = 6.63 x 10 \(^{-34}\) Js)
1. A.3.33 x 10 \(^{-18}\) J
2. B.1.33 x 10 \(^{-18}\) J
3. C.1.33 x 10 \(^{-19}\) J
4. D.3.33 x 10 \(^{-19}\) J
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Answer: B 1.33 x 10 \(^{-18}\) J
82.
The energy stored in the above capacitor is
1. A.2.25J
2. B.6.25J
3. C.18.25J
4. D.24.25J
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Answer: A 2.25J
83.
The equivalent capacitance of the capacitors in the circuit above
1. A.\(\frac{5}{2}\) C
2. B.4C
3. C.\(\frac{3}{2}\) C
4. D.2C
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Answer: D 2C
84.
The force of attraction between molecules of the same substance is
1. A.cohesion
2. B.capillarity
3. C.adhesion
4. D.surface tension
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Answer: A cohesion
85.
The fourth overtone of a closed pipes is 900Hz, its fundamental frequency is
1. A.50Hz
2. B.100Hz
3. C.200Hz
4. D.400Hz
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Answer: B 100Hz
86.
The friction due to air mass can be reduced by
1. A.streaming
2. B.lubricating
3. C.propeller
4. D.polishing
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Answer: B lubricating
87.
The gravitational force between two objects is 10N, what is the new value of the force if the distance between them is halved?
1. A.10N
2. B.20N
3. C.40N
4. D.80N
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Answer: C 40N
88.
The gravitational force between two objects masses 10 \(^{24}\) kg and 10 \(^{27}\) kg is 6.67N. Calculate the distance between them [ G = 6.6 x 10 \(^{-11}\) Nm \(^2\) kg \(^{-2}\) ]
1. A.1.0 x 10 \(^{20}\) m
2. B.2.0 x 10 \(^{-20}\) m
3. C.1.0 x 10 \(^{-20}\) m
4. D.2.0 x 10 \(^{20}\) m
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Answer: A 1.0 x 10 \(^{20}\) m
89.
The land and sea breeze is attributed to
1. A.conduction and radiation
2. B.conduction
3. C.radiation
4. D.convection
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Answer: D convection
90.
The mechanical advantage of the machine shown above
1. A.7.5
2. B.15.5
3. C.30.0
4. D.60.0
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Answer: B 15.5
91.
The moon's acceleration due to gravity is \(\frac{1}{6}\) of the earth's value. The weight of a bowling ball on the moon would be
1. A.6 times its weight on the earth
2. B.\(\frac{1}{6}\) of its weight on the earth
3. C.36 times its weight on the earth
4. D.equal to its weight on the earth
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Answer: B \(\frac{1}{6}\) of its weight on the earth
92.
The power of a convex lens of focal length 20cm is
1. A.0.05D
2. B.0.50D
3. C.5.00D
4. D.50.00D
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Answer: C 5.00D
93.
The process of adding impurities to a semiconductor material to increase its conductivity is
1. A.Rectification
2. B.Emission
3. C.Doping
4. D.Stabilization
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Answer: C Doping
94.
The property by which a material returns to its original shape after the removal of force is called
1. A.Elasticity
2. B.Ductility
3. C.Malleability
4. D.Plasticity
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Answer: A Elasticity
95.
The quantity of heat required to melt ice of 0.2 kg whose specific latent heat is 3.4 x 10 \(^5\) J/Kg is
1. A.6.8 x 10 \(^4\) J
2. B.8.6 x 10 \(^4\) J
3. C.1.7 x 10 \(^5\) J
4. D.1.7 x 10 \(^6\) J
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Answer: A 6.8 x 10 \(^4\) J
96.
The simple form of the lead acid accumulator often has a negative pole of
1. A.Zinc perioxide
2. B.Lead peroxide
3. C.Sulphuric acid
4. D.lead plate
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Answer: D lead plate
97.
The stress experienced by a wire of diameter \(\frac{\text{y}}{\pi}\) m loaded by a weight y \(^2\) N is
1. A.\(\pi\) Nm \(^{-2}\)
2. B.2 \(\pi\) Nm \(^{-2}\)
3. C.4 \(\pi\) Nm \(^{-2}\)
4. D.8 \(\pi\) Nm \(^{-2}\)
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Answer: C 4 \(\pi\) Nm \(^{-2}\)
98.
The tangential force acting on an object that opposes it from sliding freely on the adjacent surface is called
1. A.Normal force
2. B.Friction force
3. C.Weight
4. D.Upthrust
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Answer: B Friction force
99.
The thermometer whose thermometric property is change in volume with temperature is
1. A.Resistance thermometer
2. B.Thermocouple
3. C.Bimetallic thermometer
4. D.Liquid-in-glass thermometer
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Answer: D Liquid-in-glass thermometer
100.
The unit of impedance is
1. A.\(\Omega\)
2. B.T
3. C.H
4. D.W
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Answer: A \(\Omega\)
101.
The value of R in the above circuit to make the galvanometer measure 2A is
1. A.0.128 \(\Omega\)
2. B.0.256 \(\Omega\)
3. C.0.612 \(\Omega\)
4. D.1.00 \(\Omega\)
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Answer: A 0.128 \(\Omega\)
102.
The value of R required to make the galvanometer measure voltage up to 40V in the diagram above
1. A.1885 \(\Omega\)
2. B.1990 \(\Omega\)
3. C.1995 \(\Omega\)
4. D.1100 \(\Omega\)
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Answer: B 1990 \(\Omega\)
103.
The velocity ratio of an inclined plane at 60º to the horizontal is
1. A.1.055
2. B.1.155
3. C.1.255
4. D.2.00
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Answer: D 2.00
104.
Two capacitors of 0.0003μF and 0.0006μF are connected in series, find their combined capacitance.
1. A.0.0009μF
2. B.0.0002μF
3. C.0.0005μF
4. D.0.0001μF
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Answer: B 0.0002μF
105.
Two points on a velocity-time graph have coordinates (2s, 5m/s) and (4s, 15m/s). Calculate the mean acceleration
1. A.5.0ms \(^2\)
2. B.0.83ms \(^2\)
3. C.1.5ms \(^2\)
4. D.2.0ms \(^2\)
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Answer: D 2.0ms \(^2\)
106.
Two tuning forks of frequencies 6Hz and 4Hz respectively are sounded together. The beat frequency is
1. A.2Hz
2. B.5Hz
3. C.8Hz
4. D.10Hz
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Answer: A 2Hz
107.
Under which conditions is work done
1. A.A man supports a heavy load on his head with hands
2. B.A woman holds a pot of water
3. C.A boy climbs onto a table
4. D.A man pushes against a stationary petrol tanker
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Answer: C A boy climbs onto a table
108.
Using the circuit above, at resonance
1. A.V \(_L\) = V \(_R\)
2. B.V \(_R\) = V \(_R\)
3. C.V \(_L\) = V \(_L\)
4. D.V \(_L\) = V \(_C\)
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Answer: D V \(_L\) = V \(_C\)
109.
Using the diagram above, calculate the relative density of x, if the density of methanol is 800kgm \(^{-3}\)
1. A.0.8
2. B.0.5
3. C.1.5
4. D.2.5
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Answer: B 0.5
110.
Using the diagram above, the effective force pushing it forward at an angle 60º is
1. A.25.00N
2. B.28.87N
3. C.38.50N
4. D.43.30N
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Answer: A 25.00N
111.
What is the colour of red rose under a blue light?
1. A.Green
2. B.Blue
3. C.Yellow
4. D.Black
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Answer: B Blue
112.
What is the inductance reactance of a coil of 7H when connected to a 50Hz a.c circuit?
1. A.2200 \(\Omega\)
2. B.2000 \(\Omega\)
3. C.1200 \(\Omega\)
4. D.1100 \(\Omega\)
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Answer: A 2200 \(\Omega\)
113.
What is the least possible error encountered when taking measurement with a metre rule?
1. A.1.1mm
2. B.0.5mm
3. C.0.2mm
4. D.0.1mm
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Answer: B 0.5mm
114.
What will be the weight of a man of mass 60kg standing in a lift if the lift is descending vertically at 3ms \(^2\) ?
1. A.780N
2. B.546N
3. C.660N
4. D.420N
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Answer: A 780N
115.
When a bus is accelerating, it must be
1. A.changing its speed
2. B.changing its velocity
3. C.changing its position
4. D.changing its direction
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Answer: B changing its velocity
116.
When a cell of e.m.f 3.06V is connected, the balance of a potentiometer is 75cm, Calculate the new balance of a cell of e.m.f 2.295V
1. A.56.26cm
2. B.73.20cm
3. C.77.80cm
4. D.78.70cm
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Answer: A 56.26cm
117.
When a charged ebonite rod is brought near a charged glass rod, there will be
1. A.attraction
2. B.repulsion
3. C.spark
4. D.no force experienced
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Answer: A attraction
118.
When thermal energy in a solid is increased, the change in state is called
1. A.melting
2. B.evaporation
3. C.freezing
4. D.condensation
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Answer: A melting
119.
Which of the following is not a part of model rocket?
1. A.The body tube
2. B.The nose cones
3. C.The fin
4. D.Not recovery devices
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Answer: D Not recovery devices
120.
Which of the following is the best as shaving mirror?
1. A.Concave mirror
2. B.Convex mirror
3. C.plane mirror
4. D.parabolic mirror
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Answer: A Concave mirror
121.
Which of the following materials has a very large energy gap band?
1. A.Conductor
2. B.Insulator
3. C.Semiconductor
4. D.Intrinsic semiconductor
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Answer: B Insulator
122.
Which of the following measuring instruments operates based on the heating effect of electric current?
1. A.moving iron ammeter
2. B.hot wire ammeter
3. C.galvanometer
4. D.electric heater
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Answer: B hot wire ammeter
123.
Which of the following operates based on magnetic effect of electric current?
1. A.electric heater
2. B.photocell
3. C.Dynamo
4. D.Cold cathode
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Answer: C Dynamo
124.
Which of these gas laws is equivalent to workdone
1. A.Charle's law
2. B.Pressure law
3. C.Boyle's law
4. D.Gay Lussac's law
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Answer: A Charle's law

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