/*! 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. 47 A string of holiday lights can b... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 28: Q. 47 (page 792)

A string of holiday lights can be wired in series, but all the bulbs go out if one burns out because that breaks the circuit. Most lights today are wired in series, but each bulb has a special fuse that short-circuits the bulb鈥攎aking a connection around it鈥攊f it burns out, thus keeping the other lights on. Suppose a string of 50 lights is connected in this way and plugged into a 120V outlet. By what factor does the power dissipated by each remaining bulb increase when the first bulb burns out?

Short Answer

Expert verified

The power dissipated by each bulb increases by factor of1.04.

Step by step solution

01

Given information

We have given,

Number of bulb in series = 50

Voltage supply =120V

We have to find the power dissipated by the single bulb when one bulb will fused.

02

Simplify 

Let us consider every bulb has resistance R. Then

voltage across each bulb is =12550=2.4V

power dissipated by one bulb = V2R=5.76R

After one bulb is fused,

voltage across the each bulb = 12049=2.45V

Power dissipated by each bulb = 5.998R

Divided the above two values

factor=5.9985.76=1.04

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

In FIGURE EX28.3, what is the magnitude of the current in the wire to the right of the junction? Does the charge in this wire flow to the right or to the left?

For the circuit shown in FIGURE P28.62, find the current through and the potential difference across each resistor. Place your results in a table for ease of reading.

Large capacitors can hold a potentially dangerous charge long after a circuit has been turned off, so it is important to make sure they are discharged before you touch them. Suppose a 120渭Fcapacitor from a camera flash unit retains a voltage of 150Vwhen an unwary student removes it from the camera. If the student accidentally touches the two terminals with his hands, and if the resistance of his body between his hands is1.8k惟, for how long will the current across his chest exceed the danger level of 50mA?

Digital circuits require actions to take place at precise times, so they are controlled by a clock that generates a steady sequence of rectangular voltage pulses. One of the most widely

used integrated circuits for creating clock pulses is called a 555timer. FIGUREP28.77shows how the timer鈥檚 output pulses, oscillating between 0Vand 5V, are controlled with two resistors and a capacitor. The circuit manufacturer tells users that TH, the time the clock output spends in the high 15V2state,

is TH=(R1+R2)C脳IN2.. Similarly, the time spent in the low 10V2state isTL=R2C脳In2.. You need to design a clock that

What is the equivalent resistance between points a and b in FIGURE EX28.25?

What are the emf and internal resistance of the battery in FIGURE P28.46?
See all solutions

Recommended explanations on Physics Textbooks

Scientific Method Physics

Read Explanation

Medical Physics

Read Explanation

Engineering Physics

Read Explanation

Waves Physics

Read Explanation

Physics of Motion

Read Explanation

Fundamentals of Physics

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.