Physics past questions: JAMB UTME 2022

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

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

1.
A bar magnet is divided into two pieces, which of the following statement is correct?
1. A.two new magnets are created
2. B.the magnetic field of each separate piece becomes stronger
3. C.the electric field is created
4. D.the bar magnet is demagnetized
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Answer: A two new magnets are created
2.
A bar magnet is placed near and lying along the axis of a solenoid connected to a galvanometer. The pointer of the galvanometer shows no deflection when?
1. A.the magnet is moved towards the stationary solenoid
2. B.there is no relative motion
3. C.the magnet is moved away from the stationary solenoid
4. D.the solenoid is moved away from the stationary magnet
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Answer: B there is no relative motion
3.
A car starts from rest and covers a distance of 40 m in 10 s. Calculate the magnitude of its acceleration
1. A.3.20 ms \(^{-2}\)
2. B.0.25 ms \(^{-2}\)
3. C.0.80 ms \(^{-2}\)
4. D.4.00 ms \(^{-2}\)
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Answer: B 0.25 ms \(^{-2}\)
4.
A cell whose internal resistance is 0.55 \(\Omega\) delivers a current of 4 A to an external resistor. The lost voltage of the cell is?
1. A.4.00 V
2. B.2.20 V
3. C.0.15 V
4. D.8.00 V
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Answer: B 2.20 V
5.
A current of 0.5 A flows through a resistor when connected to a 40 V battery. How much energy is dispatched in 2 minutes?
1. A.2400 J
2. B.9600 J
3. C.1500 J
4. D.1200 J
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Answer: A 2400 J
6.
A magnet relay is a device used for?
1. A.reading the magnitude of magnetic flux
2. B.controlling another circuit carrying larger current
3. C.turning in sports
4. D.storing magnetic field
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Answer: B controlling another circuit carrying larger current
7.
A person standing waist-deep in a swimming pool appears to have short legs because of light?
1. A.diffraction
2. B.refraction
3. C.reflection
4. D.interference
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Answer: B refraction
8.
A reservoir is filled with liquid of density 2000 kgm \(^{-1}\) . Calculate the depth at which the pressure in the liquid will be equal to 9100 Nm \(^{-2}\) (g = 10 ms \(^{-2}\) )
1. A.0.262 m
2. B.0.664 m
3. C.0.819 m
4. D.0.455 m
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Answer: D 0.455 m
9.
A semiconductor is formed by?
1. A.co-ordinate bonds
2. B.electrovalent bonds
3. C.a substance free of bonds
4. D.covalent bonds
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Answer: D covalent bonds
10.
A train of mass 1600 kg attains a speed of 25 ms \(^{-1}\) in 20 seconds. The power developed in the engine is?
1. A.2.5 KW
2. B.80 KW
3. C.25 KW
4. D.50 KW
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Answer: C 25 KW
11.
A tuning fork having a frequency of 312 Hz emits a wave which has a wavelength of 1.10 m. Calculate the velocity of sound
1. A.312.0 ms \(^{-1}\)
2. B.110.0 ms \(^{-1}\)
3. C.343.2 ms \(^{-1}\)
4. D.686.4 ms \(^{-1}\)
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Answer: C 343.2 ms \(^{-1}\)
12.
According to kinetic molecular model in gases,
1. A.the particles are closely packed together; they occupy minimum space are usually arranged in a regular pattern
2. B.the particles vibrate about fixed positions and are held together by the strong intermolecular bonds between them
3. C.the molecules are very far apart and occupy all the spaces made available to them
4. D.the particles occur in clusters with molecules slightly further apart
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Answer: C the molecules are very far apart and occupy all the spaces made available to them
13.
An isotope has an initial activity of 120 Bq. 6 days later its activity is 15 Bq. The half-life is?
1. A.3 days
2. B.2 days
3. C.1 day
4. D.4 days
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Answer: C 1 day
14.
An object 40 cm high is 30cm from the pin hole camera. If the height of the image formed is 20 cm. What is the distance of the image from the pin height?
1. A.15 cm
2. B.70 cm
3. C.40 cm
4. D.40 cm
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Answer: A 15 cm
15.
Consider the wave equation y = 5mm sin [1cm \(^{-1}\) x - 60s \(^{-1}\) t]. The wave number is?
1. A.0.1 cm \(^{-1}\)
2. B.10cm \(^{-1}\)
3. C.1.0cm \(^{-1}\)
4. D.2cm \(^{-1}\)
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Answer: C 1.0cm \(^{-1}\)
16.
For a pear-shaped conductor shown above, the concentration of charge on the outside is highest at?
1. A.X
2. B.Z
3. C.Y
4. D.K
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Answer: A X
17.
If an object just begins to slide on a surface inclined at 30º to the horizontal,the coefficient of friction is?
1. A.√3
2. B.\(\frac{√3}{2}\)
3. C.\(\frac{1}{√2}\)
4. D.\(\frac{1}{√3}\)
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Answer: C \(\frac{1}{√2}\)
18.
In order to view the sun, the most suitable instrument to use is?
1. A.helioscope
2. B.telescope
3. C.stroboscope
4. D.sun meter
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Answer: A helioscope
19.
In the formation of sea breeze, wind blows from?
1. A.sky to land
2. B.sea to sky
3. C.land to sea
4. D.sea to land
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Answer: D sea to land
20.
One of the following is a scalar quantity?
1. A.weight
2. B.momentum
3. C.potential energy
4. D.displacement
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Answer: A weight
21.
The amount of energy required to change a kilogram of ice block into water without a change in temperature is?
1. A.specific latent heat of fusion of ice
2. B.specific heat capacity of ice
3. C.heat capacity of ice
4. D.specific heat of vaporization of ice
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Answer: A specific latent heat of fusion of ice
22.
The eclipse of the moon occurs when?
1. A.the moon reflects the rays from the sun to the earth
2. B.the moon comes exactly between the earth and the sun
3. C.the earth comes exactly between the moon and the sun
4. D.the sun comes exactly between the earth and the moon
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Answer: C the earth comes exactly between the moon and the sun
23.
The graph of pressure (P) against the reciprocal of the volume (I/V) in Boyles's law is a?
1. A.hyperbola
2. B.parabola
3. C.curve
4. D.straight line
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Answer: D straight line
24.
The gravitational pull on the moon is \(\frac{1}{6}\) that of the earth. If a body weighs 6.0 N on the moon, what will be the weight on the earth?
1. A.6.0 N
2. B.5.0 N
3. C.12.0 N
4. D.36.0 N
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Answer: D 36.0 N
25.
The main factor which affects the speed of sound wave is the?
1. A.properties of the medium
2. B.amplitude of the sound wave
3. C.intensity of the sound wave
4. D.loudness of the sound wave
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Answer: A properties of the medium
26.
The mercury column in the barometer at notational atmospheric pressure has a height of?
1. A.0.76 cm at see level
2. B.760 cm at sea level
3. C.7.6 cm at sea level
4. D.76 cm at sea level
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Answer: B 760 cm at sea level
27.
The potential energy in an elastic string of force constant k, which has an extension X is?
1. A.kX
2. B.KX \(^{2}\)
3. C.½KX \(^{2}\)
4. D.½K
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Answer: C ½KX \(^{2}\)
28.
The relationship between the coefficient of linear expansion \(\alpha\) and volumetric expansion ( \(\gamma\) ) is-----------------
1. A.\(\gamma\) = \(\alpha ^{-3}\)
2. B.\(\gamma\) = \(\alpha\)
3. C.3 \(\alpha\)
4. D.\(\gamma\) = \(\alpha ^{3}\)
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Answer: C 3 \(\alpha\)
29.
The secondary pigments consist of?
1. A.blue, green, and violet
2. B.yellow, green, and magenta
3. C.magenta, yellow, and cyan
4. D.red, green, and blue
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Answer: C magenta, yellow, and cyan
30.
The vapour pressure?
1. A.increases non-linearly with measuring temperature
2. B.increases linearly with increasing temperature
3. C.decreases linearly with increasing temperature
4. D.decreases non-linearly ith measuring temperature
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Answer: A increases non-linearly with measuring temperature
31.
Tyres are treaded to?
1. A.increase weight of tyres
2. B.increase friction
3. C.increase its longevity
4. D.look good
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Answer: B increase friction
32.
Water is not a good thermometric liquid because it?
1. A.expands unevenly between 0 ºC and 4 ºC
2. B.maintains fixed density
3. C.has low freezing point
4. D.wets glass
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Answer: A expands unevenly between 0 ºC and 4 ºC
33.
What quantity of heat is required to convert 20 g of ice at 0 ºC to water at the same temperature? (Specific latent heat of ice = 336 Jg \(^{-1}\) )
1. A.7.06 x 10 \(^{3}\) J
2. B.5.38 x 10 \(^{3}\) J
3. C.6.72 x 10 \(^{3}\) J
4. D.1.35 x 10 \(^{3}\) J
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Answer: D 1.35 x 10 \(^{3}\) J
34.
When the plate area of a capacitor increases?
1. A.the voltage can withstand increase
2. B.the capacitance decreases
3. C.the capacitance is unaffected
4. D.the capacitance increases
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Answer: D the capacitance increases
35.
Which component of fiber-optic connector has a provision of entry for the fibre along with the fixation to connector housing?
1. A.coupling device
2. B.cable
3. C.ferrule
4. D.connector housing
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Answer: A coupling device
36.
Which expression gives magnetic flux?
1. A.qVB sin \(\theta\)
2. B.\(\frac{\mu \phi I}{2 \pi r}\)
3. C.BA cos \(\theta\)
4. D.-N \(\frac{d \phi}{dt}\)
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Answer: C BA cos \(\theta\)
37.
Which of the following is not a consequence of hydrogen bubbles covering the copper plate of a primary cell?
1. A.formation of hydrogen bubbles on the electrode
2. B.increase in the resistance of the cell
3. C.local action
4. D.polarization
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Answer: C local action
38.
Which of the following liquid is a poor conductor of electricity?
1. A.Distilled water
2. B.Tap water
3. C.Sea water
4. D.Drinking water
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Answer: B Tap water
39.
Which of these is a derived unit?
1. A.Kilogram
2. B.Metre
3. C.Newton
4. D.Second
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Answer: C Newton
40.
Which of these is a second-class lever?
1. A.sugar tongs
2. B.claw hammer
3. C.plier
4. D.wheelbarrow
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Answer: A sugar tongs

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