Two wires a and b have equal lengths and are made of same material. if the diameter of wire a is twice that of wire b, which has the greater extension for a given load?

It should be A.

Explanation:

Wire A and wire B are made from the same material and have the same length, however, wire A is wider which would allow more electricity or power to be transformed.

Unless im understanding your question wrong, but from what I do understand it is most likely A.

Hope this helps, could you mark me brainliest if it is right?

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