What is the force exerted by a magnetic field on a rectangular loop of wire?

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Homework Help Overview

The problem involves a rectangular loop of wire being pulled out of a uniform magnetic field, with specific dimensions and resistance provided. The magnetic field's magnitude and direction are also specified, and the question focuses on determining the force exerted by the magnetic field on the loop at a given speed.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss the implications of the loop's rectangular shape versus a square shape, questioning how this affects the problem. There are inquiries about the directions of the magnetic field and velocity, and one participant suggests determining the current through the wire as a necessary step.

Discussion Status

The discussion is ongoing, with participants clarifying the setup and exploring the relationships between the magnetic field, velocity, and current. Some guidance has been offered regarding the importance of understanding the current in the wire, but no consensus has been reached on the approach to take.

Contextual Notes

There are references to the need for a figure to visualize the problem, indicating that visual context may be important for understanding the setup. Participants are also considering the implications of the loop's dimensions and the direction of the magnetic field.

elec_eng
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Homework Statement


A rectangular loop of wire with dimensions 2.32 by 7.91 and resistance 0.557 is being pulled to the right out of a region of uniform magnetic field. The magnetic field has magnitude 3.01 and is directed into the plane of the following figure .

At the instant when the speed of the loop is 2.99 and it is still partially in the field region, what is the magnitude of the force the magnetic field exert on the loop?


What is the direction of the force the magnetic field exert on the loop?

Homework Equations


I used
F=(BLv/R)LB

The Attempt at a Solution



I got F=.146N
 
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So how soon does the figure "follow"? Since the loop is not square it makes a difference.
 
B and v are to the right!
 
Here is the figure
http://www2.0zz0.com/2012/03/28/20/784488841.jpg
 
its pretty much what I tried. would you provide me with equations for that?
 
elec_eng said:
B and v are to the right!

No, B is into page. OK now that we have the facts we can help you.

I suggest first step is to determine the current thru the wire. Remember Michael Faraday and Georg Simon Ohm?
 

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