/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q. 41 Two 75聽W聽(120聽V) lightbulbs a... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 28: Q. 41 (page 792)

Two 75W(120V) lightbulbs are wired in series, then the combination is connected to a 120V supply. How much power is dissipated by each bulb?

Short Answer

Expert verified

Power dissipated by each bulb is18.45W.

Step by step solution

01

Given information

We have given,

For one bulb the power dissipation is 75Wat 120V.

We have to find the power dissipated by the each bulb.

02

Simplify

We know that Power dissipated by one bulb only without connected the other bulb in circuit is given by,

P=V2RR=V2PR=(102)275=192鈩�

then total resistance in the circuit after connected both the bulb will be equal to the equivalent resistance,

Req=2脳192=384鈩�

Due to equivalent resistances in series then current flowing in the circuit will be after connecting both bulb,

IReq=VI=120384=0.31A

Then power dissipated by one bulb in the circuit will be

P=I2R=(0.31)2192=18.45W

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

The capacitor in FIGURE P28.73begins to charge after the switch closes at蟿=0s..

a. What is 鈭�Vc a very long time after the switch has closed?

b. What isQmaxin terms of E,R, and C?

c. In this circuit, does localid="1649091794998" I=+dQ/dtor-dQ/dt? Explain.

d. Find an expression for the current I at time t. Graph I from 蟿=0to localid="1649091939933" t=5r.

What is the magnitude of the potential difference across each resistor in FIGURE EX28.6?

The five identical bulbs in FIGURE EX28.10are all glowing. The battery is ideal. What is the order of brightness of the bulbs, from brightest to dimmest? Some may be equal.

A. P=S>Q=R=T

B. P>Q=R=S>T

C. P>S=T>Q=R

D.P>Q=R>S=T

What is the equivalent resistance between points a and b in FIGURE EX28.26?

For the circuit shown in FIGURE P28.60, find the current through and the potential difference across each resistor. Place your results in a table for ease of reading.
See all solutions

Recommended explanations on Physics Textbooks

Energy Physics

Read Explanation

Astrophysics

Read Explanation

Electromagnetism

Read Explanation

Atoms and Radioactivity

Read Explanation

Circular Motion and Gravitation

Read Explanation

Thermodynamics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.