A moving coil voltmeter with a resistance of 2002 gives a full scale deflection of 120°, when apotential difference of 100mV is applied across it. The moving coil has dimension of30mm*25mm and is wounded with 100 turns. The control spring constant is0.375×10 N-m/degree. Find the flux density, in the air gap. Find also the diameter of copperwire of coil winding if 30% of instrument resistance is due to coil winding. The specificresistance for copper-1.7×10 m.

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A moving coil voltmeter with a resistance of 2002 gives a full scale deflection of 120°, when a potential difference of 100mV is applied across it. The moving coil has dimension of 30mm*25mm and is wounded with 100 turns. The control spring constant is Find the flux density, in the air gap. Find also the diameter of copper 0.375×10-N-m/degree. wire of coil winding if 30% of instrument resistance is due to coil winding. The specific resistance for copper-1.7×108m.

A moving coil voltmeter with a resistance of 2002 gives a full scale deflection of 120°, when a potential difference of 100mV is applied across it. The moving coil has dimension of 30mm*25mm and is wounded with 100 turns. The control spring constant is Find the flux density, in the air gap. Find also the diameter of copper 0.375×10-N-m/degree. wire of coil winding if 30% of instrument resistance is due to coil winding. The specific resistance for copper-1.7×108m.

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 8RQ

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