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1.7.1a Energy stores and energy transfers

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Question 58

Two electric heaters, A and B, transfer the same amount of useful thermal energy to warm identical blocks of metal through the same temperature rise. Heater A is more efficient than heater B.

Which statement about the heaters is correct?

A

The total electrical energy input of heater A is larger than that of heater B.

B

The total electrical energy input of heater A is smaller than that of heater B.

C

The thermal energy wasted by heater A is larger than that wasted by heater B.

D

The useful thermal energy output of heater A is larger than that of heater B.

Markscheme

1.7.1a Energy stores and energy transfers Questions

  1. IGCSE
  2. /Physics
  3. /1.7.1a Energy stores and energy transfers

229 exam-style questions on CIE IGCSE Physics 1.7.1a Energy stores and energy transfers. Each one has a worked solution and a mark scheme showing where the marks go.

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