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4.2 Electrical quantities

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Question 183

An aluminum wire of length 60 cm and cross-sectional area 0.15 mm2 has resistance RRR.

Which length of aluminum wire of cross-sectional area 0.45 mm2 has resistance RRR?

A

20 cm20\text{ cm}20 cm

B

40 cm40\text{ cm}40 cm

C

120 cm120\text{ cm}120 cm

D

180 cm180\text{ cm}180 cm

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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