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4.2 Electrical quantities

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Question 99

Copper wire is available in fixed lengths but in various radii rrr. Each radius has a different electrical conductance GGG.

Which relationship between G G\,G and r r\,r is correct?

A

GGG is directly proportional to rrr.

B

GGG is directly proportional to r2r^2r2.

C

GGG is inversely proportional to rrr.

D

GGG is inversely proportional to r2r^2r2.

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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