BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

Solutions

Chapter
Section
BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

Lightbulb A is marked “25.0 W 120. V,” and lightbulb B is marked “100. W 120. V.” These labels mean that each lightbulb has its respective power delivered to it when it is connected to a constant 120.-V source. (a) Find the resistance of each lightbulb. (b) During what time interval does 1.00 C pass into lightbulb A? (c) Is this charge different upon its exit versus its entry into the lightbulb? Explain. (d) In what time interval does 1.00 J pass into lightbulb A? (e) By what mechanisms does this energy enter and exit the lightbulb? Explain. (f) Find the cost of running lightbulb A continuously for 30.0 days, assuming the electric company sells its product at $0.110 per kWh.

(a)

To determine
The resistance of light bulb A and light bulb B.

Explanation

Given Info: The power delivered to light bulb A when connected to 120V source is 25W , The power delivered to bulb B is 100W when 120V is applied.

Explanation:

Formula to calculate resistance of bulb A is,

RA=V2PA

  • RA is the resistance of bulb A,
  • V is the voltage of power supply,
  • PA is the power delivered to bulb A,

Substitute 120V for V and 25W for RA in the above equation to find RA .

RA=(120V)225W=576Ω                                                                            (I)

Therefore, the resistance of the light bulb A is 576Ω

(b)

To determine
The time taken by 1.00C charge to pass into light bulb A.

(c)

To determine
Whether the charge is different upon its exit versus entry into the light bulb.

(d)

To determine
The time interval for 1.00J pass into light bulb A.

(e)

To determine
Mechanisms with which energy enters and leaves the light bulb.

(f)

To determine
The cost of running light bulb A

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

Cite some properties that are characteristic of a metal.

General Chemistry - Standalone book (MindTap Course List)

Which of the following describes the fat-soluble vitamins? a. few functions in the body b. easily absorbed and ...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

Does the cell cycle refer to mitosis as well as meiosis?

Human Heredity: Principles and Issues (MindTap Course List)