Answered: How much chemical energy must a 1.25V…

How much chemical energy must a 1.25V flashlight battery expend in producing a current flow of 150 mA for 4 min? Select one: a. 48.8 W b.162.5 mJoules c.6 Ohm d.45 W

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter21: Circuits And Dc Instruments

Section: Chapter Questions

Problem 21PE: The hot resistance of a flashlight bulb is 2.30 , and it is run by a 1.58-V alkaline cell having a...

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Concept explainers

Ohm's law

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.

Path of Least Resistance

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

How much chemical energy must a 1.25V flashlight battery expend in producing a current flow of 150 mA for 4 min?

Select one:

a. 48.8 W

b.162.5 mJoules

c.6 Ohm

d.45 W

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