COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 20, Problem 13QAP
To determine
Current produced by Hoover Dam
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A television uses an electric generator to work.
O True
O False
A 400-W computer (including the monitor) is turned on for 8.0 hours per day. If
electricity costs 10¢ per kWh, how much does it cost to run the computer annually for
a typical 365-day year?
$1200
none of the given choices
$15
$150
$120
Example 8: A shunt generator delivers 195 A at 250 V. The armature resistance and
shunt field resistance are 0.02 Q and 50 2 respectively. The iron and friction losses
equal 950 W. Find (a) E.M.F. generated (b) Cu losses (c) output of the prime motor
(d) commercial, mechanical and electrical efficiencies.
FUCICUCAL
Chapter 20 Solutions
COLLEGE PHYSICS
Ch. 20 - Prob. 1QAPCh. 20 - Prob. 2QAPCh. 20 - Prob. 3QAPCh. 20 - Prob. 4QAPCh. 20 - Prob. 5QAPCh. 20 - Prob. 6QAPCh. 20 - Prob. 7QAPCh. 20 - Prob. 8QAPCh. 20 - Prob. 9QAPCh. 20 - Prob. 10QAP
Ch. 20 - Prob. 11QAPCh. 20 - Prob. 12QAPCh. 20 - Prob. 13QAPCh. 20 - Prob. 14QAPCh. 20 - Prob. 15QAPCh. 20 - Prob. 16QAPCh. 20 - Prob. 17QAPCh. 20 - Prob. 18QAPCh. 20 - Prob. 19QAPCh. 20 - Prob. 20QAPCh. 20 - Prob. 21QAPCh. 20 - Prob. 22QAPCh. 20 - Prob. 23QAPCh. 20 - Prob. 24QAPCh. 20 - Prob. 25QAPCh. 20 - Prob. 26QAPCh. 20 - Prob. 27QAPCh. 20 - Prob. 28QAPCh. 20 - Prob. 29QAPCh. 20 - Prob. 30QAPCh. 20 - Prob. 31QAPCh. 20 - Prob. 32QAPCh. 20 - Prob. 33QAPCh. 20 - Prob. 34QAPCh. 20 - Prob. 35QAPCh. 20 - Prob. 36QAPCh. 20 - Prob. 37QAP
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- True or false: in a typical Canadian household, all of the appliances, such as dishwashers and washing machines, and all of the lighting fixtures, such as ceiling lights, are connected to a power socket. Question 10 options: False Truearrow_forwardAjit had a high tension tower erected on his farm land. He kept complaining to the authorities toremove it as it was occupying a large portion of his land. His uncle, who was a teacher, explainedto him the need for erecting these towers for efficient transmission of power. As Ajit realised itssignificance, he stopped complaining. Answer the following questions: (a) Why is it necessary to transport power at high voltage?(b) A low power factor implies large power loss. Explain.(c) Write two values each displayed by Ajit and his uncle.arrow_forwardConstruct Your Own Problem. Consider a battery used to supply energy to a cellular phone. Construct a problem in which you determine the energy that must be supplied by the battery, and then calculate the amount of charge it must be able to move in order to supply this energy. Among the things to be considered are the energy needs and battery voltage. You may need to look ahead to interpret manufacturer’s battery ratings in ampere-hours as energy in joules.arrow_forward
- A water jet consumes 3950W for 126 hours a week What is the energy consumed (kWh) for a one-year period? What is the utility energy charge for this period at a rate of $750/kWh? What is the energy cost savings for this period if the water jet is switched off five hours a day? 1year=365.25daysarrow_forwardPower transmission lines have transformers between the high voltage supply lines and the consumer (household or home). These transformers — A create electrical energy just prior to delivery B lower the voltage to a reasonably safe level C control the amount of energy delivered to the home D store electrons for immediate use when demanded by the consumearrow_forwardA 100-W driveway light bulb is on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb. (A) $3.65 B) $21.40 c) $73.00 D) $36.50arrow_forward
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