# A certain lightbulb is rated at 60.0 W when operating at an rms voltage of 120 V. (a) What is the peak voltage applied across the bulb? (b) What is the resistance of the bulb? (c) Does a 100-W bulb have greater or less resistance than a 60.0-W bulb? Explain.

### Physics for Scientists and Enginee...

10th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781337553278

Chapter
Section

### Physics for Scientists and Enginee...

10th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781337553278
Chapter 32, Problem 2P
Textbook Problem
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## A certain lightbulb is rated at 60.0 W when operating at an rms voltage of 120 V. (a) What is the peak voltage applied across the bulb? (b) What is the resistance of the bulb? (c) Does a 100-W bulb have greater or less resistance than a 60.0-W bulb? Explain.

(a)

To determine
The peak voltage applied across the bulb.

### Explanation of Solution

Given Information: Average power of the light bulb is 60.0â€‰W , root mean square voltage across the power source is 120â€‰V .

Formula to calculate the peak voltage applied across the bulb is,

Vpeak=2Vrms (1)

Here,

Vpeak is the peak voltage applied across the bulb.

Vrms is the root mean square voltage across the power source

(b)

To determine
The resistance of the light bulb.

(c)

To determine
Whether a 100W light bulb have greater or less resistance than a 60.0W light bulb.

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