A wire has a resistance of . Another wire of same material but length twice that of has resistance of . If is the radius of cross-section of , the radius of cross-section of is |
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a) |
b) |
c) |
d) |

A wire has a resistance of . Another wire of same material but length twice that of has resistance of . If is the radius of cross-section of , the radius of cross-section of is |
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a) |
b) |
c) |
d) |

1 Answer - 5876 Votes

3537

Resistance, R For wire P, Similarly for wire Q, Dividing Eq.(i) by Eq. (ii), we have |