/*! 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. 3 3. If you curl the fingers of yo... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 31: Q. 3 (page 900)

3. If you curl the fingers of your right hand as shown, are the electric fluxes in FIGURE Q31.3 positive or negative?

Short Answer

Expert verified

Part (a) The flux is negative.

Part (b) The flux is positive.

Step by step solution

01

Step 1. Introduction

Curl the right hand fingers around the loop with the thumb perpendicular to the surface of the loop. The thumb defines the positive direction.

If the electric field is directed along the direction of thumb then the flux through the surface is positive. If the electric field is directed opposite to the direction of thumb then the flux is negative.

02

Part (a)

In figure (a),

Curl the right hand fingers around the loop the thumb is directed out of the page, and electric field is directed into the page. So, the flux is negative.

03

Part (b)

In figure (b),

Curl the right hand fingers around the loop the thumb direction is left side, and electric field directed towards the left. So, the flux is positive.

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 magnetic field is uniform over each face of the box shown in FIGUREEX31.6. What are the magnetic field strength and direction on the front surface?

Older televisions used a loop antenna like the one in FIGUREQ31.9.How does this antenna Work?

A 5.0cmdiameter parallel-plate capacitor has a 0.50mmgap. What is the displacement current in the capacitor if the potential difference across the capacitor is increasing at 500,000V/s?

Consider current Ipassing through a resistor of radius r, length L, and resistance R.

a. Determine the electric and magnetic fields at the surface of the resistor. Assume that the electric field is uniform throughout, including at the surface.

b. Determine the strength and direction of the Poynting vector at the surface of the resistor.

c. Show that the flux of the Poynting vector (i.e., the integral of S鈫�鈰�dA鈫�) over the surface of the resistor is I2R. Then give an interpretation of this result.

A laser beam shines straight up onto a flat, black foil of mass m.

a. Find an expression for the laser power Pneeded to levitate the foil.

b. Evaluate Pfor a foil with a mass of 25渭驳.
See all solutions

Recommended explanations on Physics Textbooks

Magnetism and Electromagnetic Induction

Read Explanation

Engineering Physics

Read Explanation

Radiation

Read Explanation

Atoms and Radioactivity

Read Explanation

Oscillations

Read Explanation

Physics of Motion

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.