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An electrical cable of copper has just o...

An electrical cable of copper has just one wire of radius 9 mm. Its resistance is 10 ohm. If this single copper wire of the cable is replaced by 6 identical well insulated copper wires each of radius 3 mm, what will be the new resistance of the cable?

A

`10Omega`

B

`15Omega`

C

`30Omega`

D

`20Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
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  17. The equivalent resistance between points A and B of an infinite networ...

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  18. Equivalent resistance across A and B in the given circuit is

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  19. Effective resistance between A and B in the given circuit it is

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