B5 B5A wattmeter has two current coils connected in parallel, each having a resistance of 1.2 The wattmeteris connected in a circuit to measure power with its potential coil on the supply side. The reading on thewattmeter is 200W and the reading on the ammeter connected in series with the coil is 4A. Calculatepower loss in the wattmeter, true load power and percentage due to wattmeter connections.

Given-Resistance of current coil=1.2 ohmReading on wattmeter= 200 WattAmmeter reading= 4 A

Answered: A wattmeter

Engineering

Electrical Engineering

A wattmeter

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

Z parameter

The Z-parameters that are the impedance parameters of a two-port network are defined by expressing the two-port voltages V1 and V2 in terms of two-port currents I1 and I2. The Z-parameters are calculated by open circuiting one of the two ports at a time henceforth they are called open-circuit impedance parameters.

Question

B5
A wattmeter has two current coils connected in parallel, each having a resistance of 1.2 The wattmeter
is connected in a circuit to measure power with its potential coil on the supply side. The reading on the
wattmeter is 200W and the reading on the ammeter connected in series with the coil is 4A. Calculate
power loss in the wattmeter, true load power and percentage due to wattmeter connections.

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