The resistance of a wire of length L and radius r is R . Which one of the following would…
Physics · Class 12 · CBSE — Current Electricity
The resistance of a wire of length \(L\) and radius \(r\) is \(R\) . Which one of the following would provide a wire of the same material of resistance \(\frac{R}{2}\) ?
- Using a wire of same radius and twice the length
- Using a wire of same radius and half length
- Using a wire of same length and twice the radius
- Using a wire of same length and half the radius
Answer
(D) Using a wire of same length and half the radius
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