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

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter10: Direct-current Circuits

Section: Chapter Questions

Problem 58P: (a) How much power is dissipated in a short circuit of 240-V ac through a resistance of 0.250 ? (b)...

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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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