Question
The deflection in a moving cell galvanometer falls from 50 to 10 divisions when a shunt of 12 ohm is connected across it. The resistance of the galvanometer coil is
Answer: Option C
:
C
If k is the current sensitivity of the galvanometer the current in the galvanometer is
lg=50 K
when a shunt S is connected across it the current through the galavnometer becomes
l′g=lgSG+S=10 K
where G is the resistance of the galvanometer dividing the equations we get
G+SS=5
which gives G=4×S=4×12=48 ohm
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:
C
If k is the current sensitivity of the galvanometer the current in the galvanometer is
lg=50 K
when a shunt S is connected across it the current through the galavnometer becomes
l′g=lgSG+S=10 K
where G is the resistance of the galvanometer dividing the equations we get
G+SS=5
which gives G=4×S=4×12=48 ohm
Was this answer helpful ?
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