Question

Does the resistance of a copper wire increase or decrease when both the length and diameter are doubled

Answer 1

As both length and diameter are doubled there is no change in the wire therefore no change in the resistance is observed

Answer 2

Answer:

Originally Answered: If radius of a wire is doubled then what happens to its resistance? So by doubling the radius of wire , the resistance of the wire will become 1/4 time the previous resistance.