As a wire is stretched out so that its length increases, its cross-sectional area decreases, while the
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(a) Will the resistance after the stretch be (1) greater than, (2) the same as, or (3) less than that before the stretch?
(b) A 1.0-m length of copper wire with a 2.0-mm diameter is stretched out; its length increases by 25% while its cross-sectional area decreases, but remains uniform. Compute the resistance ratio (final to initial).
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a The resistance after the stretch will be that before ...View the full answer
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