Moving Coil Galvanometer
Moving coil galvanometer operates on Permanent Magnet Moving Coil (PMMC) mechanism and was designed by the scientist D’arsonval.
Moving coil galvanometers are of two types (i) Suspended coil (ii) Pivoted coil type or tangent galvanometer.
Its working is based on the fact that when a current carrying coil is placed in a magnetic field, it experiences a torque. This torque tends to rotate the coil about its axis of suspension in such a way that the m agnetic flux passing through the coil is maximum .
To increase the current sensitivity of a moving coil galvanometer, we should decrease
Options:
(a) strength of magnet
(b) torsional constant of spring
(c) number of turns in coil
(d) area of coil