Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 27, Problem 11SP
If the current supplied to a resistor is doubled, what happens to the power it dissipates?
Expert Solution & Answer
To determine
The change in power dissipated by the resistor when the current supplied is doubled.
Answer to Problem 11SP
Solution:
The power dissipatedis quadrupled.
Explanation of Solution
Introduction:
The expression of power loss in a resistor is written as
Here,
Explanation:
Understand that the resistance of the resistor is a constant value. Therefore,
Thus, the power is directly proportional to the square of the current.
Conclusion:
Therefore, if the current is doubled then the power dissipated by the resistor is quadruples.
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Chapter 27 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 27 - 11. If the current supplied to a resistor is...Ch. 27 - 12. A 12.0-V battery supplies 20.0 mA to a...Ch. 27 - 13. A length of wire has a certain current...Ch. 27 - 14. A 12.0-V battery is put across a 100-Ω...Ch. 27 - 15. A 12.0-V car battery supplies 15.0 A to a...Ch. 27 - 16. A resistive heater is labeled 1600 W/120 V....Ch. 27 - Prob. 17SPCh. 27 - 18. A spark of artificial 10.0-MV lightning had...Ch. 27 - Prob. 19SPCh. 27 - 20. An electric motor takes 15.0 A at 110 V....
Ch. 27 - 21. A current of 10 A exists in a line of 0.15 Ω...Ch. 27 - Prob. 22SPCh. 27 - 23. A 25.0-W, 120-V bulb has a cold resistance...Ch. 27 - 24. While carrying a current of 400 A, a...Ch. 27 - 25. How much power does a 60-W/120-V...Ch. 27 - Prob. 26SPCh. 27 - 27. A 10.0-Ω electric heater operates on a 110-V...Ch. 27 - 28. An electric motor, which has 95 percent...Ch. 27 - 29. An electric crane uses 8.0 A at 150 V to...Ch. 27 - Prob. 30SPCh. 27 - 31. Compute the cost per hour at 8.0 / kW • h of...Ch. 27 - 32. Power is transmitted at 80 kV between two...Ch. 27 - 33. A storage battery, of emf 6.4 V and internal...Ch. 27 - 34. A tank containing 200 kg of water was used...
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