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4.2.5 Electrical energy and electrical power

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Question 5

The operating voltage and current for four different electrical devices are:

  • Device A (soldering iron): 24 V, 2.5 A
  • Device B (turntable motor): 120 V, 0.05 A
  • Device C (neon indicator): 230 V, 1.5 mA
  • Device D (fence energiser): 8.0 kV8.0\text{ kV}8.0 kV, 10 mA

Which device develops the greatest electrical power?

A

Device A (soldering iron)

B

Device B (turntable motor)

C

Device C (neon indicator)

D

Device D (fence energiser)

Markscheme

4.2.5 Electrical energy and electrical power Questions

  1. IGCSE
  2. /Physics
  3. /4.2.5 Electrical energy and electrical power

69 exam-style questions on CIE IGCSE Physics 4.2.5 Electrical energy and electrical power. Each one has a worked solution and a mark scheme showing where the marks go.

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