Question

Assertion (A) : In a Wheatstone bridge circuit, if we interchange the position of the cell and the galvanometer, the balance condition \(\frac{P}{Q} = \frac{R}{S}\) remains unchanged.
Reason (R) : \(\frac{P}{Q} = \frac{R}{S} \Rightarrow \frac{P}{R} = \frac{Q}{S}\) so balance condition remains same.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Both Assertion (A) and Reason (R) are false.

Hint:

In any balanced Wheatstone bridge network, the positions of the source (cell) and the detector (galvanometer) are fully interchangeable without disturbing the fundamental null deflection state because they occupy conjugate branches of the circuit.

Answer 1

The Correct Option is A