A PMMC instrument gives 25mA at full scale reading when a potential difference across its terminals is 75mV. Show that how it can be used (a) as an ammeter for the current measurement in the range of 0-100A (b) as a 0 - 750V range voltmeter for the voltage measurement. Also, find the multiplying factor of shunt and voltage amplification.

A PMMC instrument gives 25mA at full scale reading when a potential difference across its terminals is 75mV. Show that how it can be used (a) as an ammeter for the current measurement in the range of 0-100A (b) as a 0 - 750V range voltmeter for the voltage measurement. Also, find the multiplying factor of shunt and voltage amplification.

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter30: Dc Motors

Section: Chapter Questions

Problem 6RQ: What is CEMF?

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