An ammeter has been designed by indirect method with current ranges 1A, and 5A, if PMMC meter have internal resistance of 50 2 and half scale current of 0.5 mA. Ra and Rb will be ohm --- -- Ra= 0.05005, Rb=0.01001 Ra = 0.04004 , Rb = 0.01001 %3D Ra= 0.05005 Rb= 0.04004

An ammeter has been designed by indirect method with current ranges 1A, and 5A, if PMMC meter have internal resistance of 50 2 and half scale current of 0.5 mA. Ra and Rb will be ohm --- -- Ra= 0.05005, Rb=0.01001 Ra = 0.04004 , Rb = 0.01001 %3D Ra= 0.05005 Rb= 0.04004

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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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.

Question

100%

An ammeter has been designed by indirect method with
current ranges 1A, and 5A, if PMMC meter have
internal resistance of 50 (2 and half scale current of
0.5 mA. Ra and Rb will be
--- ohm
Ra= 0.05005 , Rb=0.01001
Ra = 0.04004 , Rb = 0.01001
Ra= 0.05005 Rb= 0.04004

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