Answered: meter and ammeter are to be used to…

meter and ammeter are to be used to determine power dissipated in a resistor both instruments are guaranteed to be accurate within ± 2% at a full scale deflection

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter4: Electric Meters

Section: Chapter Questions

Problem 9RQ: Explain the operation of an analog voltmeter.

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Concept explainers

Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.

Question

Voltmeter and ammeter are to be used to determine power dissipated in a resistor both instruments are guaranteed to be accurate within ± 2% at a full scale deflection. If the voltmeter reads 75 volts on its 140 volt range and the ammeter reads 50 mA on its 80 mA range. Determine the limiting error for the power calculation.

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