JAMB Physics Past Questions 2024

10 questions from the JAMB 2024 Physics paper, with answers and explanations. Tap "Show answer" under each one when you are ready.

JAMB 2024Question 1 · Electricity and Magnetism

Find the value of a capacitor with voltage

5 V

and

30 C

A.7f
B.6f
C.15f
D.0.17f

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Answer: B. 6f

C=Q/V= $\frac{30}{5}$ =6F.

JAMB 2024Question 2 · Electricity and Magnetism

An ideal transformer has

A.Maximum primary resistance
B.No flux leakage
C.Hysteresis
D.Eddy current

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Answer: B. No flux leakage

An ideal transformer has no flux leakage.

JAMB 2024Question 3 · Electricity and Magnetism

The device for measuring the angle of dip is

A.Dip circle
B.Dip inclination
C.Dip variation
D.Dip meter

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Answer: A. Dip circle

A dip circle measures the angle of dip.

JAMB 2024Question 4 · General Physics and Measurement

A solid cube of aluminum is

1.5 cm

on each edge. The density of aluminum is

2700 kg m^{- 1}

. Find the mass of the cube.

A. $7.5 g$
B. $9.1 g$
C. $12.0 g$
D. $15.0 g$

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Answer: B. $9.1 g$

mass=density x volume=2700x $(0.015)^{3}$ = $0.0091 kg$ = $9.1 g$ .

JAMB 2024Question 5 · Heat and Thermodynamics

Which of these gas laws is equivalent to workdone

A.Charle's law
B.Pressure law
C.Boyle's law
D.Gay Lussac's law

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Answer: C. Boyle's law

Work done by an expanding/compressing gas relates to Boyle's Law (PV relationship).

JAMB 2024Question 6 · Heat and Thermodynamics

The bursting of water pipes during very cold weather, when the water in the pipes form ice could be attributed to

A.contraction of pipes when cooled
B.expansion of water on freezing
C.contraction of water on freezing
D.expansion of ice on melting

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Answer: B. expansion of water on freezing

Water expands on freezing, and this expansion can burst pipes.

JAMB 2024Question 7 · Mechanics, Motion, and Energy

The gravitational force between two objects is

10 N

, what is the new value of the force if the distance between them is halved?

A. $10 N$
B. $20 N$
C. $40 N$
D. $80 N$

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Answer: C. $40 N$

Since F is inversely proportional to $r^{2}$ , halving r quadruples F: 10x4= $40 N$ .

JAMB 2024Question 8 · Nuclear and Modern Physics

An electron falls from an energy level of

- 5.44 eV

to another energy level, E. If the emitted photon is of wavelength

5.68 \times 1 0^{- 6}

m, calculate the energy change. [ Plank's constant =

6.63 \times 1 0^{- 34}

Js, emitted radiation speed =

3.0 \times 1 0^{8}

^{- 1}

]

A. $1.49 \times 1 0^{- 20}$ J
B. $1.49 \times 1 0^{- 19}$ J
C. $3.49 \times 1 0^{- 20}$ J
D. $3.49 \times 1 0^{- 19}$ J

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Answer: C. $3.49 \times 1 0^{- 20}$ J

$E = \frac{h c}{λ} = \frac{6.63 \times 1 0 ^{- 34} \times 3 \times 1 0 ^{8}}{5.68 \times 1 0 ^{- 6}} \approx 3.49 \times 1 0^{- 20}$ J.

JAMB 2024Question 9 · Properties of Matter and Fluids

The force of attraction between molecules of the same substance is

A.cohesion
B.capillarity
C.adhesion
D.surface tension

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Answer: A. cohesion

The attractive force between molecules of the same substance is cohesion.

JAMB 2024Question 10 · Waves, Sound, and Optics

Two tuning forks of frequencies

6 Hz

and

4 Hz

respectively are sounded together. The beat frequency is

A. $2 Hz$
B. $5 Hz$
C. $8 Hz$
D. $10 Hz$

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Answer: A. $2 Hz$

Beat frequency=|6-4|= $2 Hz$ .

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