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Question

The value of R in the given figure so that there is no current in the 10Ω resistor is.



A
10Ω
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B
20Ω
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C
40Ω
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D
10Ω
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Solution

The correct option is D 10Ω
For this Wheatstone bridge to be in the balanced condition, 20×20=R×40
Implies, R=10 Ω

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