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Question

When a galvanometer is shunted with a 6Ω resistance, the deflection is reduced to one third. If galvanometer is further shunted with a resistance of 3Ω, the deflection is reduced to (relative to first reading)


Your Answer
A
one - sixth
Your Answer
B
one - fifth
Correct Answer
C
one - seventh
Your Answer
D
two - third

Solution

The correct option is C one - seventh
S=Gn1;6=G31G=6×2=12(n11)=GS1=12(6×39)=122(n11)=6;n1=7;Ig=I7

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