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4.2 Electrical quantities

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Question 26

A metal conductor Y has a resistance.

What is the change in resistance compared to Y for a conductor of the same material that is:

  • longer than Y but has the same cross-sectional area?
  • the same length as Y but has a larger cross-sectional area?
A

Resistance of longer conductor is greater; resistance of conductor with larger cross-sectional area is greater

B

Resistance of longer conductor is greater; resistance of conductor with larger cross-sectional area is smaller

C

Resistance of longer conductor is smaller; resistance of conductor with larger cross-sectional area is greater

D

Resistance of longer conductor is smaller; resistance of conductor with larger cross-sectional area is smaller

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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