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Statement I:IF a conducting wire is stre...

Statement I:IF a conducting wire is stretched to twice its length, the resistance became twice.
Statement II: For a fixed wire, the resistance is proportional to its length.

A

Statement I is true,statement II is true,statement II is a correct explantion for statement I

B

Statement I is true,statement II is truel Statement II is not a correct explanation for statement I.

C

Statement I is true,statement II is false

D

Statement I is false, statement II is true.

Text Solution

Verified by Experts

The correct Answer is:
D
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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 wire is stretched to make it 0.1% longer, its resistance will

    A
    increase by `0.2%`
    B
    decrease by `0.2%`
    C
    decrease by `0.05%`
    D
    increase by `0.05%`

  • If a wire is started to make if 0.1% longer ,its resistance will

    A
    increase by `0.2%`
    B
    decrease by `0.2%`
    C
    decrease y `0.05%`
    D
    increase by `0.05%`

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    A wire of resistance 4Omega is stretched to twice its original length. The resistance of stretched wire would be

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