COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 21, Problem 21QAP
To determine
The amount of heat produced in the transmission line after changing the voltage operating
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2.00 Q
3.00 N1.
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18.0 V
4.00 Q
4. The Power dissipated in the 20 is =
W & Power dissipated 40 is =
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5. The power dissipated across 10 is =
W & Power dissipated 30 is =
W
1. Figure shows the power consumption of a certain household in 1 day. Calculate:
(a) the total energy consumed in kWh,
(b) the average power per hour over the total 24 hour period.
1200 W
PA
800 W
200 W
→t (h)
12 2 4
6 8 10 12 2
4 6 8 10 12
noon
Every day a certain household uses a 3,3 kW electric stove for 72 minutes, six
6 hours each and miscellaneous appliances amounting to 1,6 kW h. The 3 kW hot w
ninutes during the day. If electricity costs 35 c a kWh
Chapter 21 Solutions
COLLEGE PHYSICS
Ch. 21 - Prob. 1QAPCh. 21 - Prob. 2QAPCh. 21 - Prob. 3QAPCh. 21 - Prob. 4QAPCh. 21 - Prob. 5QAPCh. 21 - Prob. 6QAPCh. 21 - Prob. 7QAPCh. 21 - Prob. 8QAPCh. 21 - Prob. 9QAPCh. 21 - Prob. 10QAP
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