PROBLEM 4: How much electrical energy is converted to thermal energy in 2.00 hrs by an electrical resistance of 400 ohms when the potential applied across it is 90.0V? (Ans: W'=145.8kJ)

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Please answer this 2 problem with complete solutions on how to arrived in that answer. Thank You 

PROBLEM 4:
How much electrical energy is converted to thermal energy in 2.00 hrs by an electrical
resistance of 400 ohms when the potential applied across it is 90.0V?
(Ans: W'=145.8kJ)
PROBLEM 5:
A 0.900 V potential difference is maintained across a 1.50 m length of tungsten wire that
has a cross-sectional area of 0.600 mm². What is the current in the wire? ANS. 6.43 A
Transcribed Image Text:PROBLEM 4: How much electrical energy is converted to thermal energy in 2.00 hrs by an electrical resistance of 400 ohms when the potential applied across it is 90.0V? (Ans: W'=145.8kJ) PROBLEM 5: A 0.900 V potential difference is maintained across a 1.50 m length of tungsten wire that has a cross-sectional area of 0.600 mm². What is the current in the wire? ANS. 6.43 A
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