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4.2 Electrical quantities

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Question 79

A resistor converts 480 J of energy when there is a current of 2.0 A in it. The potential difference across the resistor is 8.0 V.

For how long is there this current in the resistor?

A

0.033 s0.033\text{ s}0.033 s

B

30 s30\text{ s}30 s

C

120 s120\text{ s}120 s

D

1920 s1920\text{ s}1920 s

Markscheme

4.2 Electrical quantities Questions

  1. IGCSE
  2. /Physics
  3. /4.2 Electrical quantities

452 exam-style questions on CIE IGCSE Physics 4.2 Electrical quantities, covering 4.2.1a Positive and negative charge, 4.2.1b Charging by friction and detecting charge, 4.2.1c Electrical conductors and insulators, 4.2.1d Electric fields and electric field patterns, 4.2.2a Electric current, charge and measuring current, 4.2.2b Conduction in metals and the direction of current, 4.2.2c Direct current and alternating current, 4.2.3a Electromotive force, 4.2.3b Potential difference and voltmeters, 4.2.4a Resistance, 4.2.4b Resistance of a metallic wire, 4.2.4c Current–voltage graphs, and 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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