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A wire of resistance 12 Omega m^(-1) is ...

A wire of resistance `12 Omega m^(-1)` is bent to from a complete circle of radius `10 cm`. The resistance between its two diametrically opposite points, `A` and `B` as shown in the figure, is

A

`3Omega`

B

`6piOmega`

C

`6Omega`

D

`0.6piOmega`

Text Solution

Verified by Experts

The correct Answer is:
D
Wire of length `2pi xx0.1m` of `12 Omega m^(-1)` is bent to a circle
Resistance of each part `=12xxpixx0.1=1.2piOmega`
Total resistance=`0.6piOmega`
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NCERT FINGERTIPS-CURRENT ELECTRICITY-Combination Of Resistors : Series And Parallel
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