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4.2.4a Resistance

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Question 17

Copper wire is available in fixed lengths but in various radii $r$ . Each radius has a different electrical conductance $G$ .

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

A

$G$ is directly proportional to $r$ .

B

$G$ is directly proportional to $r^2$ .

C

$G$ is inversely proportional to $r^2$ .

D

$G$ is inversely proportional to $r^2$ .

Markscheme

4.2.4a Resistance Questions

IGCSE
Physics
4.2.4a Resistance

132 exam-style questions on CIE IGCSE Physics 4.2.4a Resistance. Each one has a worked solution and a mark scheme showing where the marks go.

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