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Fynjy0 [20]
3 years ago
11

12. The resistivity of a given wire of cross-sectional

Physics
1 answer:
luda_lava [24]3 years ago
3 0

R = resistivity × (l/A), A = πr^2= πd^2/4

2 =( 4.9 × 10^ -4) * (l/π0.7^2/4)

make l the subject and calculate.

i assumed we are looking for the length if the wire.

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