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3.2 Dissipation and efficiency

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Question 19
F

A student compares four devices. The table shows the energy transfers during one operation of each device.

DeviceTotal energy input in J\mathrm{J}JWasted energy output in J\mathrm{J}J
P500150
Q800200
R600180
S1000300

Which device has the greatest efficiency?

[1]
A

device Q

B

device P

C

device R

D

device S

Markscheme

3.2 Dissipation and efficiency Questions

  1. GCSE
  2. /Physics
  3. /3.2 Dissipation and efficiency

100 exam-style questions on Edexcel GCSE Physics 3.2 Dissipation and efficiency, covering 3.2.1 Dissipation of energy, 3.2.2 Reducing unwanted energy transfers, 3.2.3 Efficiency, and 3.2.4 Increasing efficiency. Each one has a worked solution and a mark scheme showing where the marks go.

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