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JAMB UTME Physics 2025 past questions and answers

This 2025 JAMB UTME Physics set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2025 set with instant marking.

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Sample JAMB UTME Physics 2025 questions

1. Outside a bar magnet, in which direction do the magnetic field lines point?
  1. From the north pole to the south pole
  2. From the south pole to the north pole
  3. Away from both poles
  4. Towards both poles

Answer: A. From the north pole to the south pole

By convention, magnetic field lines outside a magnet emerge from its north pole and enter its south pole.

2. A straight vertical wire carries a current upward. Viewed from above, what is the direction of the magnetic field around the wire?
  1. Radially outward
  2. Anticlockwise
  3. Radially inward
  4. Clockwise

Answer: B. Anticlockwise

Applying the right-hand grip rule with the thumb upward gives an anticlockwise field when viewed from above.

3. A coil of 200 turns experiences a flux change of 0.015 Wb per turn in 0.05 s. What is the magnitude of the average induced e.m.f.?
  1. 1.5 V
  2. 15 V
  3. 60 V
  4. 600 V

Answer: C. 60 V

Faraday's law gives E = NΔΦ/Δt = 200 × 0.015/0.05 = 60 V.

4. An ideal transformer has 1,000 turns in its primary coil and 240 V across it. If the secondary voltage is 12 V, how many turns are in the secondary coil?
  1. 500
  2. 200
  3. 120
  4. 50

Answer: D. 50

For an ideal transformer Ns/Np = Vs/Vp, so Ns = 1,000 × 12/240 = 50 turns.

5. Copper has an electrochemical equivalent of 3.3 × 10^-7 kg C^-1. What mass of copper is deposited when a current of 2.0 A flows for 300 s?
  1. 1.98 × 10^-4 kg
  2. 1.10 × 10^-4 kg
  3. 6.60 × 10^-5 kg
  4. 1.98 × 10^-3 kg

Answer: A. 1.98 × 10^-4 kg

The charge is Q = It = 600 C, so m = ZQ = 3.3 × 10^-7 × 600 = 1.98 × 10^-4 kg.

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