Correct option is D
· PMMC stands for Permanent Magnet Moving Coil. This type of instrument uses a permanent magnet and a moving coil to measure electric current or voltage.
· The coil is placed in the magnetic field of the permanent magnet, and when current flows through the coil, it experiences a force that causes it to move.
· This movement is proportional to the current or voltage being measured, allowing for accurate readings.
