CAPE Physics Unit 2 · 2019 · Paper 1 · Question Q4
Given that a wire of length, L, and area, A, has resistance, R, what is the resistance of a wire of similar material which is twice the length and half the diameter?
- (A)
\frac{1}{4} R - (B)
2 R - (C)
4 R - (D)
8 R
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