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1.7.1a Energy stores and energy transfers

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Question 1

Two electric heaters, $P\,$ and $Q$ , are used to heat the same mass of water through the same increase in temperature.

Heater $P\,$ is more efficient than heater $Q$ .

Which statement about the heaters is correct?

The useful energy output of heater $P$ is larger than that of heater $Q$ .

The useful energy output of heater $P$ is smaller than that of heater $Q$ .

The electrical energy input to heater $P$ is larger than that to heater $Q$ .

The electrical energy input to heater $P$ is smaller than that to heater $Q$ .

Markscheme

1.7.1a Energy stores and energy transfers Questions

IGCSE
Physics
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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