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Measurements and Instrumentation - Engineering

Q1:

To avoid creep in an energy meter

A two shading bands are put on shunt magnet

B two shading bands are put on series magnet

C two holes are cut in the disc on opposite sides of spindle

D the potential coil is made of very thin wire

ANS:C - two holes are cut in the disc on opposite sides of spindle

When a hole comes under a pole of upper electromagnet the disc becomes stationary. Thus creep is avoided.