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4.2.4a Resistance

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Question 19

A metal resistance wire of length $l\,$ and radius $r\,$ has resistance $R$ .

What is the resistance of a metal wire of the same material that has length 3l and radius $2 r$ ?

A

$34R\frac{3}{4}R$

B

$32R\frac{3}{2}R$

C

$43R\frac{4}{3}R$

D

$6 R$

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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