Two moving coil meters, and have the following particulars:
(The spring constants are identical for the two meters).
Determine the ratio of current sensitivity of
The torque experienced by the moving coil M1 for a current I passing through it will be equal to
The coil will experience a restoring torque proportional to the twist
The current sensitivity is therefore
Similarly, for the coil M2, current sensitivity is
Their ratio of current sensitivity of coil M2 to that of coil M1 is, therefore,