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The resistance of a wire of length L and radius r in R. Which one of the following would provide a wire of the name mate…

Q1

The resistance of a wire of length L and radius r in R. Which one of the following would provide a wire of the name material of resistance \(\frac{R}{2}\) ?

a

Using a wire of name radius and twice the length

b

Using a wire of same radius and half length

c

Using a wire of same length and twice the radius

d

Using a wire of same length and half the radius

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