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4.2 Electrical quantities

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Question 256

The potential difference (p.d.) across a small electric heater is 24 V. The current in the heater is 1.5 A.

How much energy is transferred by the heater in 2.0 hours2.0\text{ hours}2.0 hours?

A

4320 J4320\text{ J}4320 J

B

4320 W4320\text{ W}4320 W

C

259,200 J259,200\text{ J}259,200 J

D

259,200 W259,200\text{ W}259,200 W

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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