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An electric wire is stretched to increas...

An electric wire is stretched to increase its length by 25%, keeping area of cross section same. By what % will the resistance be increased and what will be the increase in its resistivity?

A

Resistance = 75%, resistivity = 25%

B

Resistance = 25%, resistivity = 75%

C

Resistance -25%, resistivity=no change

D

Resistance = 75%, resistivity=no change

Text Solution

Verified by Experts

The correct Answer is:
C
Resistance -25%, resistivity=no change
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Knowledge Check

  • The wire is stretched to increase the length by 1%. Find the percentage change in the resistance.

    A
    1
    B
    2
    C
    3
    D
    4

  • A wire is stretched to n times its length. Then the resistance now will be increase by

    A
    n times
    B
    1/n times
    C
    `n^(2)` times
    D
    `1// n^(2)` times

  • If side of a square is increased by 60%, then what will be the percentage increase in its area?

    A
    156
    B
    120
    C
    126
    D
    132

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    A copper wire is stretched so as to increase its length by 0.2%. Calculate the percentage change in the resistance of the wire.

    A cylindrical wire is stretched to increase its length by 10%. Calculate the percentage increase in resistance.

    A cylindrical metallic wire is stretched to increase its length by 5%. Calculate the percentage change in its resistance.

    A wire is stretched 30%, what is the % change in its resistance?

    If the side of square is increased by 6%, then what will be the percentage increase in its area?

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