Verified Solution • 2025–26 Session moderate

QAIPM-2011-Ph-1806: NEET 2011 Physics - Class 12 AIPM-2011-Ph-1806 Solution: A galvanometer of resistance G, is shunted by a resistance S…

A galvanometer of resistance G, is shunted by a resistance S ohm. To keep the main current in the circuit unchanged, the resistance to be put in series with the galvanometer is

Multiple Choice Options

A $\frac{G}{S+G}$
B $\frac{S^2}{S+G}$
C $\frac{SG}{S+G}$
D $\frac{G^2}{S+G}$

Step-by-Step Verified Solution

To keep the main current in the circuit unchanged, the resistance of the galvanometer should be equal to the net resistance. _ G = ( G S G + S ) + S _ _ G _ G S G + S = S _ _ S _ = G 2 G + S

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