In an electrical cable there is a single wire of radius of copper. Its resistance is The cable is replaced by 6 different insulated copper wires, the radius of each wire is Now the total resistance of the cable will be |
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a) |
b) |
c) |
d) |

In an electrical cable there is a single wire of radius of copper. Its resistance is The cable is replaced by 6 different insulated copper wires, the radius of each wire is Now the total resistance of the cable will be |
|||||||

a) |
b) |
c) |
d) |

1 Answer

127 votes

**(a)**

Initially : Resistance of given cable

…(i)

Finally : Resistance of each insulated copper wire is

Hence equivalent resistance of

cable …(ii)

on solving equation (i) and (ii), we get

127 votes

127