/*! 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. 38 An ideal battery would produce a... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 27: Q. 38 (page 763)

An ideal battery would produce an extraordinarily large current if "shorted" by connecting the positive and negative terminals with a short wire of very low resistance. Real batteries do not. The current of a real battery is limited by the fact that the battery itself has resistance. What is the resistance of a 9.0V battery that produces a 21A current when shorted by a wire of negligible resistance?

Short Answer

Expert verified

The resistance of a9.0Vbattery that produces a21Acurrent when shorted by a wire of negligible resistance is429m惟.

Step by step solution

01

Given Information

Voltage=9.0V

Current=21A

02

Explanation

By applying Ohm's law, we can find the resistance,

r=UI鈫�(1)

Assuming ris the battery's internal resistance (which is always denoted by rwhen compared with external resistances).

Substitute the values in equation (1)

r=9V21A

=0.429惟

03

Final Answer

Hence, the resistance is429m惟.

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 current supplied by a battery slowly decreases as the battery runs down. Suppose that the current as a function of time is I=(0.75A)e-4[6h). What is the total number of electrons transported from the positive electrode to the negative electrode by the charge escalator from the time the battery is first used until it is completely dead?

70. Two 10-cm-diameter metal plates 1.0cm apart are charged to 卤12.5nC. They are suddenly connected together by a0.224-mm- diameter copper wire stretched taut from the center of one plate to the center of the other.
a. What is the maximum current in the wire?
b. Does the current increase with time, decrease with time, or remain steady? Explain.
c. What is the total amount of energy dissipated in the wire?

The current in an electric hair dryer is 10.0A. How many electrons flow through the hair dryer in 5.0min?

Variations in the resistivity of blood can give valuable clues about changes in various properties of the blood. Suppose a medical device attaches two electrodes into a 1.5mmdiameter vein at positions role="math" localid="1649141775053" 5.0cmapart. What is the blood resistivity if a 9.0Vpotential difference causes a230渭A current through the blood in the vein?

The total amount of charge that has entered a wire at time tis given by the expressionQ=(20C)1-e-4(20s), where tis in seconds andt鈮�0.
a. Find an expression for the current in the wire at timet.
b. What is the maximum value of the current?
c. Graph Iversus tfor the interval 0鈮�t鈮�10s.
See all solutions

Recommended explanations on Physics Textbooks

Solid State Physics

Read Explanation

Energy Physics

Read Explanation

Oscillations

Read Explanation

Dynamics

Read Explanation

Electricity

Read Explanation

Atoms and Radioactivity

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.