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In the given ...

Question

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

A

20

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B

30

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C

50

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D

100

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Solution

The correct option is A 20
$V_{x} = 2 V V_{100} = 10 V I = \frac{V_{100}}{R} = \frac{10}{100} = 0.1 A V_{x} = I X 2 = 0.1 X X = 20 Ω$

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