Answered: A 120-watt light bulb has a resistance…

A 120-watt light bulb has a resistance of 30 Ω. What current will run through the light bulb when it is turned on? a. 5.0 A b. 2.0 A c. 3.0 A d. 1.0 A e. 4.0 A

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter17: Current And Resistance

Section: Chapter Questions

Problem 62AP

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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

A 120-watt light bulb has a resistance of 30 Ω. What current will run through the light bulb when it is turned on?

a.

5.0 A

b.

2.0 A

c.

3.0 A

d.

1.0 A

e.

4.0 A

Expert Solution

Step 1

Given,

P $=$ 120 W

R $=$ 30 $Ω$

We have to find the current that will run through the light bulb, when it is turned on.

Let's see how we find it :

Step by step

Solved in 2 steps

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