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4.2.4a Resistance

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Question 33

An aluminum wire is placed in an electrical circuit and its resistance is measured. The wire is then replaced with a second aluminum wire of the same material, but with three times the length and half the diameter of the first wire.

What is the ratio of the resistance of the first wire to that of the second wire?

A

1:61:61:6

B

1:121:121:12

C

1:181:181:18

D

1:241:241:24

Markscheme

4.2.4a Resistance Questions

  1. IGCSE
  2. /Physics
  3. /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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