A wire is stretched so as to change its diameter by 0.25%. The percentage change in resistance is
a)
4.0%
b)
2.0%
c)
1.0%
d)
0.5%
A wire is stretched so as to change its diameter by 0.25%. The percentage change in resistance is
a)
4.0%
b)
2.0%
c)
1.0%
d)
0.5%
Question ID - 150359 | SaraNextGen Top Answer
A wire is stretched so as to change its diameter by 0.25%. The percentage change in resistance is
a)
4.0%
b)
2.0%
c)
1.0%
d)
0.5%
|
A wire is stretched so as to change its diameter by 0.25%. The percentage change in resistance is |
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|
a) |
4.0% |
b) |
2.0% |
c) |
1.0% |
d) |
0.5% |
1 Answer
127 votes
Answer Key / Explanation : (c) -
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(c) On stretching, volume (
Now, Taking logarithm of both the side and differentiating it we get
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) remains constant. So
127 votes
Answer Link
127