Specific heat capacity and specific latent heat Quiz
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5 questions, one answer each
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1. What is the energy needed to raise 2.0 kg of a metal (c = 400 J kg⁻¹ K⁻¹) by 10 K?
- A. 200 J
- B. 800 J
- C. 8000 J
- D. 80 000 J
2. Which equation applies during melting at constant temperature?
- A. E = mcΔθ
- B. E = Lm
- C. E = VI
- D. E = ½mv²
3. An immersion heater supplies 50 W for 200 s. How much energy is supplied?
- A. 0.25 J
- B. 4 J
- C. 250 J
- D. 1.0 × 10⁴ J
4. Why would the measured latent heat of vaporisation be larger than the true value?
- A. The balance is too sensitive
- B. Energy is lost to the surroundings
- C. The heater power is too high
- D. The water is too pure
5. What happens to the p.d. across an NTC thermistor in a divider as the temperature rises?
- A. It rises
- B. It stays the same
- C. It falls
- D. It becomes zero