PassSparkWAEC WASSCE Physics 2006 past questions and answers
This 2006 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 2006 set with instant marking.
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Sample WAEC WASSCE Physics 2006 questions
1. What quantity of heat is required to raise the temperature of 0.50 kg of a substance of specific heat capacity 400 J kg^-1 K^-1 by 20 K?
- 2,000 J
- 4,000 J
- 8,000 J
- 40,000 J
Answer: B. 4,000 J
Using Q = mcΔT gives 0.50 × 400 × 20 = 4,000 J.
2. How much energy is needed to vaporize 0.20 kg of a liquid whose specific latent heat of vaporization is 2.3 × 10^6 J kg^-1?
- 46,000 J
- 115,000 J
- 230,000 J
- 460,000 J
Answer: D. 460,000 J
The energy is mL = 0.20 × 2.3 × 10^6 = 4.6 × 10^5 J.
3. A fixed mass of gas has pressure 100 kPa at 300 K; if its volume remains constant, what is its pressure at 450 K?
- 150 kPa
- 200 kPa
- 250 kPa
- 300 kPa
Answer: A. 150 kPa
At constant volume, P/T is constant, so P2 = 100 × 450/300 = 150 kPa.
4. A 2.0 m metal rod has a linear expansivity of 1.2 × 10^-5 K^-1; how much does it lengthen when heated by 50 K?
- 1.2 × 10^-5 m
- 6.0 × 10^-4 m
- 1.2 × 10^-3 m
- 2.4 × 10^-3 m
Answer: C. 1.2 × 10^-3 m
The increase in length is αLΔT = 1.2 × 10^-5 × 2.0 × 50 = 1.2 × 10^-3 m.
5. A wave has frequency 250 Hz and wavelength 0.80 m; what is its speed?
- 31.25 m/s
- 125 m/s
- 200 m/s
- 312.5 m/s
Answer: C. 200 m/s
Wave speed is fλ = 250 × 0.80 = 200 m/s.
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