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What resistor should be connected in par...

What resistor should be connected in parallel with the `20Omega` resistor in branch ADC in the circuit shown in fig. so that potential difference between B and D may be zero ?

A

`20 Omega`

B

`10 Omega`

C

`5 Omega`

D

`5 Omega`

Text Solution

Verified by Experts

The correct Answer is:
A
By symmetry, we see that the current in the left and right arms
should be the same. It means no current should flow from A to B.
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