An electric heater of resistance 8.0Ω draws 15A from the service mains. What is the power dissipated in watts and determine the cost of operating the heater for a period of 4.0h at 10 cents / kWh. (2 Answers, Power and Cost)

An electric heater of resistance 8.0Ω draws 15A from the service mains. What is the power dissipated in watts and determine the cost of operating the heater for a period of 4.0h at 10 cents / kWh. (2 Answers, Power and Cost)

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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Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

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