The coil of a galvanometer is `0.02xx0.8 m^2`. It consists of 200 turns of the wire and is in a
Channel: Doubtnut
Date: 2020-07-26

The coil of a galvanometer is `0.02xx0.8 m^2`. It consists of 200 turns of the wire and is in a magnetic field of 0.20 T. The restoring torque constant of suspension fibre is `10^(-5) Nm//degree.` Assuming magnetic field to be radial  (a) What is the maximum current that can be measured by this galvanometer if scale can accommodate `45^@` deflection?  (b) What is the smallest current that can be detected if minimum observed deflection is `0.1^@`?