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A metallic wire is stretched to increase...

A metallic wire is stretched to increase its length by 20% .What will be the percentage change of its resistance?

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The correct Answer is:
increases by 44%
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Knowledge Check

  • When a wire is stretched to double its length

    A
    strain is unity
    B
    stress is equal to Young's modulus of elasticity
    C
    its radius is halved
    D
    Young's modulus is equal to twice the elastic potential energy per unit volume .

  • If a copper Wire is stretched to make it 0.1% longer, the percentage change in its resistance is

    A
    `0.2%` increase
    B
    `0.2%` decrease
    C
    `0.1%` increase
    D
    `0.1%` decrease

  • A nichrome wire of resistivity rho is stretched to make it 10% longer. The percentage change in the resistance will be

    A
    `10%`
    B
    `20%`
    C
    `21%`
    D
    `11%`

    • Similar Questions

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    A wire has a resistance of 16 Omega . It is melted and drawn into a wire of half its length. What is the percentage change in its resistance?

    If a copper wire is stretched to make its radius decrease by 0.15% . then the percentage increase in resistance is approximately

    The resistance of a wire is 5Omega . It is streached to increase length by 20%. If the volume is unaltered, then what is the final resistance.

    The length of a wire of cylindrical cross section is increased by 100%. Find out the percentage change is the resistance,taking into account the consequent decrease in the diameter of the wire.

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