Question

How can we increase the current sensitivity of galvanometer

Answer 1

Answer:

k = theta/ i = NBA /C

Sensitivity of a moving coil galvanometer is defined as the current i in microampere required to consume 1 millideflection.

where all the symbols have their usual meaning and C is the torque per unit twist .Thus the sensitivity of the galvanometer can be increased either by increasing the number of turns (N), using strong magnet or increasing the area of the coil (A)

Answer 2

Answer:

To increase the current sensitivity of a moving coil galvanometer by `50%` its resistance is increased so that the new resistance becomes twice its initial resistance.