Question

A moving coil galvanameter has been fitted
with a reatangular coil having soturns & dieme
& 3cm. The radial magnetic feild which
is coil is suspened to 0.05 ab/m². The
torsional constant of spoing tis x 10 9 Nm/degus
find electric current?​

Answer 1

N=50 turns

I=5cm

b=3cm

B=0.05Wb/m  

2

 

c=1.5×10  

−9

Nm/degree

θ=30  

∘

 

Now the current through the coil is,

I=  

BNA

c

​  

θ=  

0.05×50×0.05×0.03

1.5×10  

−9

 

​  

×30

=1.2×10  

−5

A