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To find the resistance of a gold bangle,...

To find the resistance of a gold bangle, two diametrically opposite points of the bangle are connected to the two terminals of the left gap of a metre bridge. A resistance of `4 Omega` is introduced in the right gap. What is the resistance of the bangle if the null point is at 20 cm from the left end?.

A

`2 Omega`

B

`4 Omega`

C

`8 Omega`

D

`16 Omega`

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