A wire of length l and resistance R is stretched so that its length is doubled and the area of cross-section is halved. How will its (a) resistance change? (b) resistivity change?
Answers
Answered by
3
Answer:
resistance will become 4 times of that .....
resistivity depends on the material and tempreture ..so no change
Explanation:
Answered by
9
Explanation:
a resistance is directly proportional to its length
so resistance becomes 4 times
b resistivity does not depend upon area and length so it will not change
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