JAMB Physics Past Questions 2022

10 questions from the JAMB 2022 Physics paper, with answers and explanations. Tap "Show answer" under each one when you are ready.

JAMB 2022Question 1 · Electricity and Magnetism

A bar magnet is divided into two pieces, which of the following statement is correct?

A.two new magnets are created
B.the magnetic field of each separate piece becomes stronger
C.the electric field is created
D.the bar magnet is demagnetized

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Answer: A. two new magnets are created

Cutting a bar magnet in two produces two smaller complete magnets, each with its own poles.

JAMB 2022Question 2 · Electricity and Magnetism

A cell whose internal resistance is 0.55

Ω

delivers a current of

4 A

to an external resistor. The lost voltage of the cell is?

A. $4.00 V$
B. $2.20 V$
C. $0.15 V$
D. $8.00 V$

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Answer: B. $2.20 V$

Lost voltage=Ixr=4x0.55= $2.2 V$ .

JAMB 2022Question 3 · Electricity and Magnetism

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?

A. $2400 J$
B. $9600 J$
C. $1500 J$
D. $1200 J$

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Answer: A. $2400 J$

Energy=VIt=40x0.5x120= $2400 J$ .

JAMB 2022Question 4 · General Physics and Measurement

One of the following is a scalar quantity?

A.weight
B.momentum
C.potential energy
D.displacement

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Answer: C. potential energy

Potential energy is a scalar quantity.

JAMB 2022Question 5 · Heat and Thermodynamics

In the formation of sea breeze, wind blows from?

A.sky to land
B.sea to sky
C.land to sea
D.sea to land

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Answer: D. sea to land

Sea breezes blow from the cooler sea towards the warmer land during the day.

JAMB 2022Question 6 · Mechanics, Motion, and Energy

Tyres are treaded to?

A.increase weight of tyres
B.increase friction
C.increase its longevity
D.look good

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Answer: B. increase friction

Tyre treads increase friction (grip) with the road.

JAMB 2022Question 7 · Mechanics, Motion, and Energy

A train of mass

1600 kg

attains a speed of

25 m s^{- 1}

in 20 seconds. The power developed in the engine is?

A. $2.5 K W$
B. $80 K W$
C. $25 K W$
D. $50 K W$

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Answer: C. $25 K W$

Power=(0.5x1600x625)/20= $25, 000 W$ = $25 kW$ .

JAMB 2022Question 8 · Properties of Matter and Fluids

According to kinetic molecular model in gases,

A.the particles are closely packed together; they occupy minimum space are usually arranged in a regular pattern
B.the particles vibrate about fixed positions and are held together by the strong intermolecular bonds between them
C.the molecules are very far apart and occupy all the spaces made available to them
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

In gases, molecules are far apart and spread to fill all available space.

JAMB 2022Question 9 · Waves, Sound, and Optics

Consider the wave equation y =

5 mm

sin [

1 c m^{- 1}

x -

60 s^{- 1}

t]. The wave number is?

A. $0.1 c m^{- 1}$
B. $10 c m^{- 1}$
C. $1.0 c m^{- 1}$
D. $2 c m^{- 1}$

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Answer: C. $1.0 c m^{- 1}$

Comparing to y=Asin(kx-omega t), the wave number k=1.0 $c m^{-} 1$ .

JAMB 2022Question 10 · Waves, Sound, and Optics

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

A. $312.0 m s^{- 1}$
B. $110.0 m s^{- 1}$
C. $343.2 m s^{- 1}$
D. $686.4 m s^{- 1}$

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Answer: C. $343.2 m s^{- 1}$

v=f x lambda=312x1.10= $343.2 m s^{- 1}$ .

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JAMB Physics Past Questions 2022

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