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WAEC WASSCE Physics 2026 past questions and answers

This 2026 WAEC WASSCE 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 2026 set with instant marking.

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Sample WAEC WASSCE Physics 2026 questions

1. A radioactive sample has a mass of 80 g. What mass remains after 12 days if its half-life is 4 days?
  1. 20 g
  2. 10 g
  3. 5 g
  4. 40 g

Answer: B. 10 g

Three half-lives elapse, so the mass falls from 80 g to 40 g, 20 g and finally 10 g.

2. For electromagnetic radiation of a fixed type, what happens to the energy of each photon when its frequency is doubled?
  1. It is halved
  2. It is unchanged
  3. It is doubled
  4. It is quadrupled

Answer: C. It is doubled

Photon energy is E = hf, so doubling frequency doubles the energy.

3. A transistor has a collector current of 4.0 mA and a base current of 40 μA; what is its current gain?
  1. 10
  2. 40
  3. 100
  4. 160

Answer: C. 100

The current gain is Ic/Ib = 4.0 mA/0.040 mA = 100.

4. What is the output of a NAND gate when both of its inputs are 1?
  1. 1
  2. Both 0 and 1
  3. It depends on frequency
  4. 0

Answer: D. 0

A NAND gate gives the inverse of AND, and AND(1,1) is 1, so the NAND output is 0.

5. The mass defect of a nucleus is 0.020 u; what is its binding energy, given that 1 u corresponds to 931 MeV?
  1. 18.62 MeV
  2. 9.31 MeV
  3. 46.55 MeV
  4. 1.862 MeV

Answer: A. 18.62 MeV

The binding energy is 0.020 × 931 MeV = 18.62 MeV.

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