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The metre bridge shown is in balanced position with \( \frac{\mathrm{P}}{\mathrm{Q}}=\frac{\ell_{1}}{\ell_{2}} \). If we now interchange the positions of
\( \mathrm{P} \)
W galvanometer and cell, will the bridge work? If yes, what will be balance condition ?
(1) yes, \( \frac{\mathrm{P}}{\mathrm{Q}}=\frac{\ell_{2}-\ell_{1}}{\ell_{2}+\ell_{1}} \)
(2) no, no null point
(3) yes, \( \frac{\mathrm{P}}{\mathrm{Q}}=\frac{\ell_{2}}{\ell_{1}} \)
(4) yes, \( \frac{P}{Q}=\frac{\ell_{1}}{\ell_{2}} \)
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