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JAMB Physics 2025 past questions and answers

2 questions. Try each one, then open the answer to check yourself and read the explanation.

Question 2

Capacitors

The equivalent capacitance for the circuit drawn below is

Diagram for this question
  1. A.18μf
  2. B.4μf
  3. C.2μf
  4. D.12μf
  5. E.13μf
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Answer: B (4μf)

Explanation

5 μF and 7 μF in parallel give 12 μF. In series with 6 μF: C = (6 × 12)/(6 + 12) = 4 μF.

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Question 4

Waves

If the wavelength of a wave travelling with a velocity of 360 ms−1 is 60m, the period of the wave is

  1. A.6s
  2. B.3.6s
  3. C.0.17s
  4. D.0.61s
  5. E.3s
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Answer: C (0.17s)

Explanation

f = v/λ = 360 ÷ 60 = 6 Hz, so T = 1/6 ≈ 0.17 s.

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