Question

For a moving coil galvanometer, the deflection in the coil is $005$ rad when a current of $10 \,mA$ is field is $0,01 \,T$ and the number of turns in the coil is $200$ , the area of each tum (in $cm ^2$ ) is :

• A. $2.0$
• B. $1.0$
• C. $1.5$
• D. $0.5$

Answer 1

Answer: (B)

$1.0$

Answer 2

The correct answer is (B) : 1.0
τ=Kθ
NiAB=Kθ
A=NiBKθ​=200×10×10−3×0.014×10−5×0.05​
On solving A=10−4m2=1cm2