Question

what will happen to the resistance if radius become twice​

Answer 1

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Here, Resistance of a wire is inverself proportional to the area of cross-section. So, when we double the radius, it will increase the cross-section of the wire four-times. When radius is doubled, Resistance decreased 2² times which is 4.

Answer 2

Answer:

Explanation:

When resistance of a wire is inversely proportional to the area of cross section. So, when we twice the radius,it will increase the cross section of the wire four times. When radius is double, resistance decreased twice which is 4