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4.2 Electrical quantities

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Question 91

A 1.60 m length of resistance wire with a diameter of 0.60 mm has a resistance of 12.0 Ω.

A second piece of resistance wire of the same material with a diameter of 0.30 mm also has a resistance of 12.0 Ω.

What is the length of the second piece of wire?

A

0.40 m0.40\text{ m}0.40 m

B

0.80 m0.80\text{ m}0.80 m

C

3.20 m3.20\text{ m}3.20 m

D

6.40 m6.40\text{ m}6.40 m

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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