Choose the correct circuit which can achieve the bridge balance.

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Current Electricity question

2024 · Q192

Current Electricity question

2024 · Q192

View written solutionFree

Correct answer: A

In option (1),

$$ \frac{10}{15}=\frac{10}{5+R_D} $$

The diode can conduct and have resistance $R_D=10 \Omega$ because diode have dynamic resistance. In that case bridge will be balanced.

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