Current Electricity - Result Question 92

97. The metre bridge shown is in balance position with $\frac{P}{Q}=\frac{l_1}{l_2}$. If we now interchange the position of galvanometer and cell, will the bridge work? If yes, what will be balance condition?

[NEET Odisha 2019]

(a) yes, $\frac{P}{Q}=\frac{l_1}{l_2}$

(b) yes, $\frac{P}{Q}=\frac{l_2-l_1}{l_2+l_1}$

(c) no, no null point

(d) yes, $\frac{P}{Q}=\frac{l_2}{l_1}$

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Answer:

Correct Answer: 97. (a)

Solution:

  1. (a) For Balanced Bridge

$ \frac{P}{Q}=\frac{l_1}{l_2} $

For balanced bridge (finally)

On interchanging galvanometer and battery positions, the balance condition remains unchanged.