Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 22: Q49PE (page 813)

Repeat Exercise 22.41 but with the loop lying flat on the ground with its current circulating counterclockwise (when viewed from above) in a location where the Earth's field is north, but at an angle 45°below the horizontal and with a strength of6.00×10‐5T.

Short Answer

Expert verified

(a) Maximum torque on a loop is0.67N‐mand direction is west.

(b) The torque is very small so the loop will not have any practical application as a motor.

Step by step solution

01

Definition of torque

Torque, also known as force moment, is the tendency of a force to spin the body to which it is applied in physics.

We can use the equation to determine the torque,

τ=NIABsin(θ) ………….(1)

02

Finding the torque using the formula(a)

Substitute the values in the equation (1), and we get

τ=200×100A×0.79m26.00×10‐5T×sin45°=0.67N‐m

Hence, the required maximum torque on a loop is 0.67N‐m

Considering direction of force and current we find that the direction of torque is in west.

03

Justification (b)

The torque is very small so the loop will not have any practical application as a motor.

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.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

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

(a) What is the speed of a supersonic aircraft with a17.0‐m wingspan, if it experiences a1.60‐V Hall voltage between its wing tips when in level flight over the north magnetic pole, where the Earth’s field strength is8.00×10‐5T (b) Explain why very little current flows as a result of this Hall voltage.

An example of magnetohydrodynamics (MHD) comes from the flow of a river (salty water). This fluid interacts with the Earth’s magnetic field to produce a potential difference between the two river banks. How would you go about calculating the potential difference?

Figure22.57shows a long straight wire near a rectangular current loop. What is the direction and magnitude of the total force on the loop?

(a) Viewers of Star Trek hear of an antimatter drive on the Starship Enterprise. One possibility for such a futuristic energy source is to store antimatter-charged particles in a vacuum chamber, circulating in a magnetic field, and then extract them as needed. Antimatter annihilates with normal matter, producing pure energy. What strength magnetic field is needed to hold antiprotons, moving at\({\rm{5}}{\rm{.00 \times 1}}{{\rm{0}}^{\rm{7}}}{\rm{ m/s}}\)in a circular path\({\rm{2}}{\rm{.00 m}}\)in radius? Antiprotons have the same mass as protons but the opposite (negative) charge. (b) Is this field strength obtainable with today’s technology or is it a futuristic possibility?

Use the right-hand rules to show that the force between the two loops in Figure 22.49 is attractive if the currents are in the same direction and repulsive if they are in opposite directions. Is this consistent with like poles of the loops repelling and unlike poles of the loops attracting? Draw sketches to justify your answers.
See all solutions

Recommended explanations on Physics Textbooks

Solid State Physics

Read Explanation

Electrostatics

Read Explanation

Engineering Physics

Read Explanation

Kinematics Physics

Read Explanation

Torque and Rotational 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.

Sign-up for free