A heating element is made by maintaining a potential difference of 75.0 V across the length of a Nichrome wire that has a 2.60 * 10-6 m2 cross section. Nichrome has a resistivity of 5.00 * 10-7 ohmm. (a) If the element dissipates 5000 W, what is its length? (b) If 100 V is used to obtain the same dissipation rate, what should the length be?

A heating element is made by maintaining a potential difference of 75.0 V across the length of a Nichrome wire that has a 2.60 * 10-6 m2 cross section. Nichrome has a resistivity of 5.00 * 10-7 ohmm. (a) If the element dissipates 5000 W, what is its length? (b) If 100 V is used to obtain the same dissipation rate, what should the length be?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 17CQ: Resistors are commonly rated at 18W,14W,12W ,1 W and 2 W for use in electrical circuits. If a...

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