CAPE Physics Unit 2 · 2014 · Paper 1 · Question Q3
Given that a wire of length, L, and cross-sectional area, A, has resistance, R, what is the resistance of a wire of similar material which is twice as long and half the diameter?
- (A)
\frac{1}{4}R - (B)
2R - (C)
4R - (D)
8R
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