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What is the full form of PMMC?
The full form of PMMC is Permanent Magnet Moving Coil.
How does a PMMC instrument work?
A PMMC instrument works on the principle of electromagnetic induction, where a moving coil in the magnetic field of a permanent magnet experiences a deflecting torque proportional to the current flowing through it.
What are the main components of a PMMC instrument?
The main components of a PMMC instrument include a permanent magnet, moving coil, pointer, scale, spring, pivot, jewel bearings, and a damping mechanism.
What types of errors can affect a PMMC instrument?
Errors in a PMMC instrument can be caused by temperature changes, aging of the permanent magnet, mechanical friction, and eddy currents.
What are the advantages of using a PMMC instrument?
The advantages of using a PMMC instrument include high accuracy, good sensitivity, a linear scale, low power consumption, and stable performance.