Length of a wire and its cross sectional area is doubled. What is the change in its resistivity ?
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Answer:
As we know,
Resistance is directly proportional to the length of the wire and inversely proportional to the area of cross-section of the wire.
If length is doubled,
2R=2l
If the area is doubled,
R = 1/2A
Hence, there will be no change in resistance.
Explanation:
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Answered by
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Answer:
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Explanation:
Resistance is directly proportional to the length of the wire and inversely proportional to the area of cross-section of the wire. Hence, there will be no change in resistance.
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