JAMB Physics Past Questions and Answers

919 questions from 16 JAMB Physics papers, 2010 to 2025. Pick a year to see 10 of its questions with answers.

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Sample questions from JAMB 2025

JAMB 2025Question 1 · Electricity and Magnetism

Two identical cells, each of emf

1.5 V

and internal resistance

1 Ω

, are connected in parallel to supply current to a

2 Ω

resistor. What is the total current?

A. $0.8 A$
B. $1.0 A$
C. $0.4 A$
D. $0.6 A$

Show answer

Answer: D. $0.6 A$

Equivalent emf $E_{e q} = 1.5 V$ (same as a single cell). Equivalent internal resistance $r_{e q} = \frac{1}{2} = 0.5 Ω$ (parallel). Total resistance $R_{t o t a l} = r_{e q} + 2 = 2.5 Ω$ . Current $I = \frac{E _{e q}}{R _{t o t a l}} = \frac{1.5}{2.5} = 0.6 A$ .

JAMB 2025Question 2 · Electricity and Magnetism

Three identical cells, each of e.m.f.

1.5 V

, are connected in series to form a battery, as shown above. What is the total e.m.f. of the battery?

A. $0.5 V$
B. $1.5 V$
C. $3.0 V$
D. $4.5 V$

Show answer

Answer: D. $4.5 V$

For identical cells connected in series, the total e.m.f. is the sum of the individual e.m.f.s: $1.5 + 1.5 + 1.5 = 4.5 V$ .

JAMB 2025Question 3 · Electricity and Magnetism

The emf of a cell is the potential difference across its terminals when it is in

A.series connection
B.closed circuit
C.open circuit
D.parallel connection

Show answer

Answer: C. open circuit

JAMB 2025Question 4 · Heat and Thermodynamics

5400 kJ

of heat energy was lost when some amount of steam condensed to water for drinking purposes at

1 5^{\circ} C

. What is the quantity of water collected? [

L_{f} = 2.26 \times 1 0^{6} Jkg^{- 1}

c_{w} = 4200 Jkg^{- 1} K^{- 1}

]

A. $0.95 kg$
B. $8.24 kg$
C. $1.84 kg$
D. $2.06 kg$

Show answer

Answer: D. $2.06 kg$

JAMB 2025Question 5 · Mechanics, Motion, and Energy

If the length of a simple pendulum is

120 cm

, calculate its frequency.

[π = \frac{22}{7}, g = 10 ms^{- 2}]

A. $2.8 Hz$
B. $1.2 Hz$
C. $12 Hz$
D. $0.5 Hz$

Show answer

Answer: D. $0.5 Hz$

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Topics that come up most

Waves, Sound, and Optics · 193
Mechanics, Motion, and Energy · 184
Electricity and Magnetism · 164
Heat and Thermodynamics · 160
Properties of Matter and Fluids · 74
Nuclear and Modern Physics · 57
General Physics and Measurement · 46
Electronics and Alternating Current · 41

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