Try 10 free Physics questions below, each with the answer explained. When you are ready, practise all 2,060 on a timed CBT screen.
The WASSCE (May/June) is the West African Examinations Council's final exam for secondary school students. Each subject has an objective (multiple-choice) paper and a theory or essay paper.
Tap an answer to check it and see the explanation.
Which of these is NOT a vector quantity: displacement, distance, velocity or weight?
Answer: A. distance has magnitude only, so it is a scalar.
A car accelerates uniformly from 13 m/s to 85 m/s in 9 s. Find its acceleration.
Answer: B. a = (v − u) ÷ t = (85 − 13) ÷ 9 = 8 m/s².
A spring of force constant 410 N/m is stretched by 20 cm. Find the force applied.
Answer: A. F = ke = 410 × 0.2 = 82 N (convert cm to m first).
A machine uses 1,550 J of energy and does 620 J of useful work. Find its efficiency.
Answer: A. Efficiency = output ÷ input × 100 = 620 ÷ 1,550 × 100 = 40%.
A force of 18 N acts 50 cm from the pivot of a balanced lever. What force acting 100 cm on the other side balances it?
Answer: A. Principle of moments: 18 × 50 = F × 100, so F = 9 N.
A coin at the bottom of a tank of liquid 45 cm deep appears to be 30 cm below the surface. Find the refractive index of the liquid.
Answer: D. n = real depth ÷ apparent depth = 45 ÷ 30 = 1.5.
What does an ohmmeter measure?
Answer: D. An ohmmeter measures electrical resistance.
One common use of radio waves is
Answer: A. Radio and television broadcasting uses radio waves.
The acceleration due to gravity near the Earth's surface is about
Answer: B. g is approximately 9.8 m/s² (often rounded to 10 m/s²).
The becquerel is the SI unit of
Answer: B. The SI unit of activity of a radioactive source is the becquerel.
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Create a free accountQuestions in the MyGradePrep bank for each topic.
| Topic | Questions |
|---|---|
| Motion | 346 |
| Work, energy and power | 300 |
| Electricity | 254 |
| Waves | 142 |
| Scalars and vectors | 121 |
| Force | 120 |
| Moments | 120 |
| Current electricity | 120 |
| Elasticity | 100 |
| Pressure | 89 |
| Heat | 61 |
| Density | 60 |
| Momentum | 60 |
| Machines | 60 |
| Light | 40 |
| Units | 33 |
| Measurement | 25 |
| Vectors | 7 |