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4.2 Electrical quantities

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Question 171

A wire has a resistance of 12.0 Ω.

A second wire of the same material has three times the length and twice the cross-sectional area of the first wire.

What is the resistance of the second wire?

A

8.0 Ω8.0\ \Omega8.0 Ω

B

12.0 Ω12.0\ \Omega12.0 Ω

C

18.0 Ω18.0\ \Omega18.0 Ω

D

72.0 Ω72.0\ \Omega72.0 Ω

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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