Electric hair dryer heating wire has a rating of 4.1 kW when connected to a 240 v line. a) Find the current in the heating wire b) What is the resistance of the heating coil at the operating temperature of the coil c) At 11 cents per kWh, how much does it cost to operate the dryer for 1 hour?

Electric hair dryer heating wire has a rating of 4.1 kW when connected to a 240 v line. a) Find the current in the heating wire b) What is the resistance of the heating coil at the operating temperature of the coil c) At 11 cents per kWh, how much does it cost to operate the dryer for 1 hour?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 57PQ

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Electric hair dryer heating wire has a rating of 4.1 kW when connected to a 240 v line.
a) Find the current in the heating wire

b) What is the resistance of the heating coil at the operating temperature of the coil

c) At 11 cents per kWh, how much does it cost to operate the dryer for 1 hour?

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