Physics · 2019
JEE Main · 9 January 2019, Shift 1 · Q1
A copper wire is stretched to make it 0.5% longer. The percentage change in its electrical resistance if its volume remains unchanged is:
A copper wire is stretched to make it $\displaystyle 0.5$% longer. The percentage change in its electrical resistance if its volume remains unchanged is :
Official answer
(2)
1.$\displaystyle 0$ %
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.