Answered: 18. An electric heater is designed to…

18. An electric heater is designed to operate in 100 V main with a power output of 1000 W. When it is connected to a 25 V source, power output is: (A) 40 W (B) 100 W (C) 62.5 w (D) 250 W

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter22: Electric Current

Section22.2: Using Electric Energy

Problem 31PP

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Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

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In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.

Question

18. An electric heater is designed to operate in 100 V main
with a power output of 1000 W. When it is connected to a 25 V
source, power output is:
(A) 40 W
(B) 100 W
(C) 62.5 W
(D) 250 W

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