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Two copper wires of the same length have...

Two copper wires of the same length have got different diameters
a. which wire has greater resistance?
b. greater specific resistance?

Text Solution

Verified by Experts

a. For a given wire, `R=rho l/A`, i. e. `Rprop1/A`
So the thinner wire will have greater resistance
b.Specific resistance (`rho`) is a material property. It does not depend of `l` or `A`.
So, both the wire will have same specific resistance.
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