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For a balanced bridge, P/Q = I₁/I₂.

1. For Balanced Bridge P/Q = I₁/I₂
2. For Balanced Bridge P/Q = I₂/I₁
3. For Balanced Bridge P/Q = I₁²/I₂²
4. For Balanced Bridge P/Q = I₂²/I₁²

Correct answer: For Balanced Bridge P/Q = I₁/I₂

Solution

In a balanced Wheatstone bridge, the ratio of resistances in one branch is equal to the ratio of resistances in the other branch, which is expressed as P/Q = I₁/I₂.

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