Answered: (0 - 1 mA) ammeter has its interval…

(0 - 1 mA) ammeter has its interval resistance of 42. It's range is to be extended to 100 A. Then the value of shunt resistance required is

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter5: Resistors

Section: Chapter Questions

Problem 8RQ: A 10,000- resistor has a tolerance of 5%. What are the minimum and maximum values of this resistor?

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Concept explainers

Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.

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(0 - 1 mA) ammeter has its interval resistance of
42. It's range is to be extended to 100 A. Then
the value of shunt resistance required is

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