Answer
(d) decreases by a factor of 4
Work Step by Step
The power dissipated in wire with current $I$ is given by $I^{2}R$
So, if current is halved, the power dissipation will decrease by a factor of ${2^{2}}=4$
College Physics (7th Edition)
by Wilson, Jerry D.; Buffa, Anthony J.; Lou, Bo
Published by
Pearson
ISBN 10:
0-32160-183-1
ISBN 13:
978-0-32160-183-4
Chapter 17 - Electric Current and Resistance - Learning Path Questions and Exercises - Multiple Choice Questions - Page 617: 21
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