In the given circuit, if the galvanometer shows zero reading, then x= __

Question

In the given circuit, if the galvanometer shows zero reading, then
x= ___ ohms

Options:

A . 20

B . 30

C . 50

D . 100

Answer: Option A
:
A

V_{x} = 2 V V_{100} = 10 V I = \frac{V_{100}}{R} = \frac{10}{100} = 0.1 A V_{x} = I X 2 = 0.1 X X = 20 Ω

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