Physics past questions: NECO SSCE 2004

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

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

1.
A body has masses of 0.013kg and 0.012 kg in oil and water respectively. If the relative density of oil is 0.875 calculate the mass of the body.
1. A.0.02 kg
2. B.0.03kg
3. C.0.04kg
4. D.0.05kg
5. E.0.06kg
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Answer: A 0.02 kg
2.
A body of mass 40g loses 80J of heat energy. If the specific heat capacity of the body is 400 Jk\(g^{-1}\), calculate the change in temperature of the body.
1. A.0.2K
2. B.0.4K
3. C.2.0K
4. D.5.0K
5. E.10.0K
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Answer: D 5.0K
3.
A car travels with a constant velocity of 45 kmh-1 for 20s. What distance does it cover in this time?
1. A.0.025m
2. B.0.250m
3. C.2.500m
4. D.25.000m
5. E.250.000m
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Answer: E 250.000m
4.
A current flows in a series circuit containing a resistor, R, an inductor, L and a capacitor, C. Which of the following is true of the power dissipated in the circuit component(s)?
1. A.The power dissipated in L is greater than zero
2. B.The power dissipated in R is zero
3. C.The sum of the power dissipated in L and C is equal to that in R
4. D.The sum of the power dissipated in L and C is greater than in R
5. E.The sum of the power dissipated in L and C is zero
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Answer: E The sum of the power dissipated in L and C is zero
5.
A force F is applied to a body P as shown in the diagram above. If the body moves through a distance, a, which of the following represents the work done? [img: A force F is applied to a body P as shown in the diagram above.... - Myschool]
1. A.Fa
2. B.Fa Cos θ
3. C.\(\frac{Fa}{\cos \theta}\)
4. D.FaSin θ
5. E.\(\frac{Fa}{\sin \theta}\)
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Answer: B Fa Cos θ
6.
A mass of 5kg is suspended from the ceiling of a lift with a light inextensible string. As the lift moves upwards with an acceleration of 2m\(s^{-2}\), the tension in the string is [g = 10m\(s^{-2}]\)
1. A.25N
2. B.40N
3. C.50N
4. D.60N
5. E.70N
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Answer: B 40N
7.
A note, A from a guitar produces a wave of amplitude 4 mm and frequency 1000 Hz. Another note, B from a whistle produces a similar waveform of amplitude 2 mm and frequency 2200 Hz. If the two notes are compared,
1. A.A has a higher pitch than B
2. B.A is louder than B
3. C.B has a greater speed than A
4. D.B is louder than A
5. E.A and B have the same quality
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Answer: B A is louder than B
8.
A plane which is Inclined at an angle of 30 ° to the horizontal has a velocity ratio of
1. A.2
2. B.1
3. C.0.87
4. D.0.67
5. E.0.5
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Answer: A 2
9.
A projectile fired with initial velocity, u will attain its maximum height H when the angle of projection θ is
1. A.30°
2. B.45°
3. C.60°
4. D.75°
5. E.90°
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Answer: E 90°
10.
A radioactive isotope has a half-life of 8 days. What fraction of the atoms will remain after 72 days?
1. A.\(9.766 × 10 ^{-4}\)
2. B.\(1.736 ×10 ^{-3}\)
3. C.\(1.953 ×10 ^{-3}\)
4. D.\(3.472 × 10 ^{-3}\)
5. E.\(3.906 x 10 ^{-3}\)
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Answer: C \(1.953 ×10 ^{-3}\)
11.
A ray of light experiences a minimum deviation when passing through an equilateral triangular glass prism. Calculate the angle of incidence of the ray. [Refractive index of glass = 1.5]
1. A.300.0°
2. B.48.6°
3. C.60.0°
4. D.75.5°
5. E.105.0 °
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Answer: B 48.6°
12.
A resistor connected in parallel with a galvanometer so that a large amount of current can be measured is called a/an
1. A.ammeter
2. B.avometer
3. C.coil resistor
4. D.multiplier
5. E.shunt
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Answer: E shunt
13.
A stone is dropped from the top of a tower of height 11 .25m. Calculate the time it will take to reach the ground. [g = 10ms-2]
1. A.1.00s
2. B.1.50s
3. C.2.25s
4. D.2.50s
5. E.3.00s
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Answer: B 1.50s
14.
A surface in the path of an advancing wave on which all the particles are in the same state of disturbance is called a
1. A.crest
2. B.cycle
3. C.pulse
4. D.trough
5. E.wave front
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Answer: E wave front
15.
A voltage supply of 12V r.m.s. and frequency 90Hz is connected to a 4 ω resistor. Calculate the peak value of the current
1. A.48.8 A
2. B.30.0 A
3. C.27.5 A
4. D.4.2 A
5. E.3.0A
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Answer: D 4.2 A
16.
An electron makes a transition from - 1.60 eV energy level to - 10.4eV energy level Calculate the energy loss due to the transition.
1. A.16.64eV
2. B.12.00eV
3. C.10.40eV
4. D.8.80eV
5. E.6.50eV
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Answer: D 8.80eV
17.
Calculate the energy stored in an inductor of inductance 0.5H when a current of 3A flows through it.
1. A.15.00 J
2. B.9.45 J
3. C.6.00 J
4. D.4.50J
5. E.2.25 J
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Answer: E 2.25 J
18.
Calculate the magnitude of the electric field intensity in a vacuum at a distance of 25cm from a charge of 5 × 10-3C. Take ( \(\frac{1}{4πε0} = 9\times10^9Nm^2C^{-2}\) )
1. A.7.2 × 108N\(C ^{-1}\)
2. B.1.8 × 108N\(C ^{-1}\)
3. C.5.6 × 108N\(C ^{-1}\)
4. D.3.6 × 108N\(C ^{-1}\)
5. E.1.5 × 106N\(C ^{-1}\)
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Answer: A 7.2 × 108N\(C ^{-1}\)
19.
Calculate the wavelength of light travelling with a speed of 3 × 108m\(s^{-1}\) and a frequency of \(6.2 × 10^{14}\)Hz.
1. A.\(4.8 × 10 ^{-8} m\)
2. B.\(4.8 × 10 ^{-7} m\)
3. C.\(4.8 × 10 ^{-6} m\)
4. D.\(4.8 × 10 ^{-5} m\)
5. E.\(4.8 × 10 ^{-4} m\)
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Answer: B \(4.8 × 10 ^{-7} m\)
20.
Emission spectra are caused by
1. A.kinetic energy of moving atoms
2. B.potential energy of an electron in an atom
3. C.transition of an electron from a higher energy level to a lower energy level
4. D.transition of an electron from a lower energy level to higher energy level
5. E.transition of excited protons in the nucleus
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Answer: C transition of an electron from a higher energy level to a lower energy level
21.
For total internal reflection to occur, I. light must be travelling from an optically more dense to an optically less dense medium. II. the angle of incidence in the denser medium must be greater than its critical angle. III. the angle of refraction in the less dense medium must be equal to 90 °. Which of the statements above is/are correct?
1. A.I only
2. B.II only
3. C.III only
4. D.I and II only
5. E.II and III only
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Answer: D I and II only
22.
Heat I. is a form of energy II. is measured with a thermometer III. cannot be created or destroyed IV. from a hot object is transferred through conduction only. Which of the statements above are correct?
1. A.I and II only
2. B.I and III only
3. C.I, II and III only
4. D.II, III and IV only
5. E.I, II, III and IV
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Answer: B I and III only
23.
How far from a hill should a boy stand to hear the echo of his clap 1 .6s later? [Speed of sound in air is 340m\(s^{-1}]\)
1. A.186m
2. B.272m
3. C.544m
4. D.1088m
5. E.2000m
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Answer: B 272m
24.
If the distance between the plates of a parallel plate capacitor is decreased, its capacitance
1. A.becomes zero
2. B.decreases
3. C.increases
4. D.is halved
5. E.remains the same
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Answer: C increases
25.
In which of the following are crystalline structures observable? I. Gas II. Liquid III. Solid
1. A.I only
2. B.II only
3. C.III only
4. D.I and III only
5. E.II and III only
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Answer: C III only
26.
In which of these fields are repulsive forces NOT experienced? I. Magnetic field II. Gravitational field III. Electric field
1. A.I only
2. B.II only
3. C.III only
4. D.I and III only
5. E.II and III only
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Answer: B II only
27.
The component of a vector in a given direction is
1. A.equal to the magnitude of the resultant vector in that direction
2. B.equal to the magnitude of the resultant vector in the opposite direction
3. C.its effective magnitude
4. D.its effective value in that direction
5. E.its effective value in the opposite direction
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Answer: D its effective value in that direction
28.
The frequency of a body executing simple harmonic motion when left undisturbed is known as__________ frequency.
1. A.damped
2. B.forced
3. C.free
4. D.natural
5. E.sinusoidal
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Answer: D natural
29.
The general equation of a wave CANNOT be written as
1. A.y = A Sin [2 π ( \(\frac{t}{T}\) ± Xλ)]
2. B.y = A Sin [wt ± kx]
3. C.y = A Sin [2 \(\frac{\pi}{\lambda}\) (vt ± x)]
4. D.y = A Sin [2π (ft ± \(\frac{X}{\lambda}\) )]
5. E.y = A Sin 2 π f(T ± \(\frac{X}{\lambda}\) )]
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Answer: E y = A Sin 2 π f(T ± \(\frac{X}{\lambda}\) )]
30.
The rate of diffusion of gases increases with increase(s) in I. density II. temperature III, mass. Which is/are correct?
1. A.I only
2. B.II only
3. C.I and II only
4. D.II and III only
5. E.I, II and III
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Answer: B II only
31.
The relative density of dilute tetraoxosulphate (vi) acid in a battery is measured with a
1. A.barometer
2. B.hydrometer
3. C.manometer
4. D.hypsometer
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Answer: B hydrometer
32.
The resultant of two forces P and Q is least when the angle between them is
1. A.0°
2. B.45°
3. C.60°
4. D.90°
5. E.180°
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Answer: E 180°
33.
The temperature at which the water vapour present in the air is just enough to saturate the air is the _______ point.
1. A.boiling
2. B.critical
3. C.dew
4. D.ice
5. E.steam
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Answer: C dew
34.
The time \(t_{1}, t_{2}\) and \(t_{3}\) for 20 complete oscillations of a simple pendulum experiment are 32.0s, 34.6s and 35.5s respectively. Calculate the mean period of the pendulum.
1. A.1.60s
2. B.1.70s
3. C.1.73s
4. D.1.78s
5. E.5.11s
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Answer: B 1.70s
35.
What is the uncertainty in the measurement of time, if the uncertainty in measuring the energy of an electron of mass \(10^{-30}\) kg is \(2.45 × 10^{-19}J\)? \(h = 6.6 × 10^{-34}\)
1. A.\(1.35 ×10 ^{-15} s\)
2. B.\(2.69 × 10 ^{-15} s\)
3. C.\(4.15 × 10 ^{-15} s\)
4. D.\(9.05 × 10 ^{-15} s\)
5. E.\(1.62 × 10 ^{-14} s\)
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Answer: B \(2.69 × 10 ^{-15} s\)
36.
When the same amount of current, I is passed through different wires under the same conditions, the rates of production of heat are
1. A.directly proportional to I
2. B.directly proportional to the resistances of the wires
3. C.directly proportional to the square of the resistances of the wires
4. D.inversely proportional to I
5. E.inversely proportional to the resistance of the wires
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Answer: B directly proportional to the resistances of the wires
37.
When very hot water is poured into a thin-walled glass container, it is less likely to break because
1. A.all parts of the container got heated-uniformly
2. B.glass can withstand a very high temperature
3. C.the molecules of glass are too far apart to cause breakages of the container
4. D.the outer part of the container is cooler than the inner part
5. E.thin glass does not expand fast
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Answer: A all parts of the container got heated-uniformly
38.
Which of the following conclusion(s) can be drawn from Newton's second law of motion? Force is proportional to I. the product of mass and acceleration II. the product of mass and velocity III. Impulse
1. A.I only
2. B.II only
3. C.III only
4. D.II and III only
5. E.I, II and III
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Answer: E I, II and III
39.
Which of the following is NOT an example of a percussion instrument?
1. A.Bell
2. B.Drum
3. C.Flute
4. D.Gong
5. E.Xylophone
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Answer: C Flute
40.
Which of the following is used as a depolarizer in a Denial cell?
1. A.Ammonium chloride
2. B.Copper (II) tetra Oxo sulphate (VI) solution
3. C.Manganese (IV) oxide
4. D.Tetraoxo sulphate (VI) acid
5. E.Water
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Answer: B Copper (II) tetra Oxo sulphate (VI) solution
41.
Which of the following statements is true of nuclear fission?
1. A.Heavy nuclei combine to form new element
2. B.Protons are used in bombarding heavy nucleus
3. C.The sum of the masses of the products is greater than the mass of the original substance
4. D.Two light nuclei are made to combine to form a heavy nucleus
5. E.Very large amount of energy is released
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Answer: E Very large amount of energy is released
42.
Which of the statements about prism binoculars is/are correct? They I. are a pair of two telescopes mounted side by side II. reduce the optical path of the light ray from the objective to the eye piece III, present inverted and diminished image to the viewer IV. present erect and magnified image to the viewer.
1. A.I only
2. B.II only
3. C.I and II only
4. D.I, II and IV only
5. E.II, III and IV only
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Answer: D I, II and IV only
43.
Which of these expresses the relationship between the earth's magnetic field FE, and the field' FB due to a magnet at neutral points? FE is
1. A.equal and opposite to \(F ^{B}\)
2. B.equal to and in the same direction with \(F ^{B}\)
3. C.greater than and in the same direction with \(F _{B}\)
4. D.greater than and opposite to \(F _{B}\)
5. E.less than and opposite to \(F _{B}\)
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Answer: A equal and opposite to \(F ^{B}\)
44.
Which property of a fluid determines its suitability as a lubricant?
1. A.Capillarity
2. B.Diffusion
3. C.Solubility
4. D.Surface tension
5. E.Viscosity
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Answer: E Viscosity
45.
Which to the following is NOT a fundamental unit?
1. A.Ampere
2. B.Kelvin
3. C.Kilogramme
4. D.Newton
5. E.Second
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Answer: D Newton

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