Answered: How much power is dissipated by a dc…

How much power is dissipated by a dc circuit with a resistance of 80 ohms if the current through the circuit is 1.5 amperes? A) 120 watts B) 180 watts C) 80 watts D) 270 watts

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter29: Service-entrance Calculations

Section: Chapter Questions

Problem 6R: What load may be used for an electric range rated at not over 12 kW? (Table 220.55) _____

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Question

9. How much power is dissipated by a dc circuit with a resistance of 80 ohms if the current through the circuit is 1.5 amperes?

A) 120 watts

B) 180 watts

C) 80 watts

D) 270 watts

10. If 15 volts are applied to a dc circuit which has a high resistance of 75 ohms, how much power will the circuit dissipate?

A) 1125 watts

B) 0.2 watt

C) 5 watts

D) 3 watts

11. The normal current through a load resistor is 2 amperes and the normal voltage drop across it is 120 volts. What is the half power point of the load power?

A) 169.68 watts

B) 240 watts

C) 120 watts

D) 84.84 watts

12. When current flows through a resistance:

A) Heat is produced.

B) Power is dissipated.

C) Neither (a) nor (b).

D) Both (a) and (b).

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