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1.7 Energy, work and power

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Question 166

A physicist suggests several ways to transfer energy to a small, stationary copper block resting on an insulating stand. They propose the following methods:

  1. Place the block in thermal contact with a hotter object.
  2. Direct a laser beam onto the surface of the block.
  3. Establish an electric current through the block.

Which of these methods successfully transfer energy to the block?

A

1 and 2 only

B

1 and 3 only

C

2 and 3 only

D

1, 2, and 3

Markscheme

1.7 Energy, work and power Questions

  1. IGCSE
  2. /Physics
  3. /1.7 Energy, work and power

533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.

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