Question

A wire has diameter 2 mm and resistivity 3.14 X10^-8Ωm.What will be
the length of this wire to make the resistance 10Ω?How much does the resistance change if the resistance is doubled?

first right answer will be marked brainliest..

Answer 1

So by doubling the radius of wire , the resistance of the wire will become 1/4 time the previous resistance.

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Answer 2

Answer:

first you double the radius