Question

The heating element for an electric fire is made from a wire of resistance R. It is replaced with a wire of the same material which has the same length but is twice the diameter. The resistance of this second wire is?
A. 0.25R
B. 0.5R
C. 2R
D. 4R

Answer 1

Answer:

0.5 will be answer according to me.

hope it will help you .

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