The masses of three wires of copper are in the ratio and lengths are in the ratio . Then the ratio of their electrical resistances are |
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a) |
b) |
c) |
d) |

The masses of three wires of copper are in the ratio and lengths are in the ratio . Then the ratio of their electrical resistances are |
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a) |
b) |
c) |
d) |

1 Answer

127 votes

Let , then . Again let , then and . If be the density of copper, then Hence and |

127 votes

127