A moving coil galvanometer has a coil with turns and area

PHYSICS · Single correct · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism

Problem

A moving coil galvanometer has a coil with

175

turns and area

1 cm^2

. It uses a torsion band of torsion constant

10^{-6} N-m/rad

. The coil is placed in a magnetic field

B

parallel to its plane. The coil deflects by

1^\circ

for a current of

1mA

. The value of

B

(in Tesla) is approximately: (1)

10^{-4}

(2)

10^{-2}

(3)

10^{-1}

(4)

10^{-3}