A certain electric motor draws a current of 72 A when connected to 120 V. (a) What is the motor's power consumption? W(b) How much energy does it use during 8 h of operation? Express the answer in joules and in kilowatt-hours. J kWh

A certain electric motor draws a current of 72 A when connected to 120 V. (a) What is the motor's power consumption? W(b) How much energy does it use during 8 h of operation? Express the answer in joules and in kilowatt-hours. J kWh

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter22: Electric Current

Section22.2: Using Electric Energy

Problem 31PP

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Question

A certain electric motor draws a current of

72 A

when connected to 120 V.

(a) What is the motor's power consumption?
W

(b) How much energy does it use during

8 h

of operation? Express the answer in joules and in kilowatt-hours.

	J
	kWh

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