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In the below circuit, the battery E(1) h...

In the below circuit, the battery `E_(1)` has an emf of 12 V and zero internal resistance. While the battery `E_(2)` has an emf of 2 V.

If the galvanometer G reads zero, then the value of the resistance X in ohm is

A

`10 Omega`

B

`100 Omega`

C

` 500 Omega`

D

`200 Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
b. Clearly, `E_2 = IY`
`2 = 12/(500+Y) Y or 500 + Y = 6Y`
or `5Y = 500 or Y = 100 Omega` .
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