When a weight of is suspended from a copper wire of length and diameter , its length increases by . If the diameter of the wire is doubled, then the extension in its length will be |
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a) |
b) |
c) |
d) |

When a weight of is suspended from a copper wire of length and diameter , its length increases by . If the diameter of the wire is doubled, then the extension in its length will be |
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a) |
b) |
c) |
d) |

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