Torque on a current carrying wire

In summary: I am not an expert summarizer of content.In summary, the question asks for the value of current that will cause a 20cm square loop of rigid wire to start moving on a paramagnetic table under a uniform magnetic field of B=0.6 rans. The loop is connected to a thick copper wire via two thin, light leads. The force on the right leg of the loop will be directed out of the page, while the force on the left leg will be into the page. Friction is not expected to play a significant role. The solution involves applying the summation of forces and considering the component of the force that opposes friction.
  • #1
dimpledur
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Homework Statement



magfield.png

Consider the 20cm square loop of rigid wire shown in the figure. The wire has a diameter of 3mm and is lying flat on a table made of paramagnetic material. A uniform magnetic field of B=0.6 rans parallel to the table top as pictured. Electrical connection to the thick copper wire is established via two very thin, light leads as shown. The density of copper is 8.96g/cm^3 and the coefficient of friction is 0.2.
What value of current into the loop will cause the loop to start to move?
Describe how the loop will move.

Homework Equations



[itex]\vec{F}=I(\vec{L}\times\vec{B}[/itex]

The Attempt at a Solution


I know that the force on the right hand leg will be directed out of the page, and that the force on the left leg will be into the page. As far as I can tell, the right side of the loop will want to lift off the table, and the left side will want to push into the table. I don't really think that friction will have a play in this. Would we merely apply sum of F=0 on the left leg?
mg=ILBsinx?
 
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  • #2
The right hand side will begin to lift up, and eventually the force will have a component that opposes the frictional force. I don't know what else to do from here. Sorry
 

FAQ: Torque on a current carrying wire

What is torque on a current carrying wire?

Torque on a current carrying wire is the measure of the rotational force on the wire due to the interaction between the magnetic field and the electric current flowing through it.

How is torque on a current carrying wire calculated?

The torque on a current carrying wire is calculated using the formula T = I x B x l x sin(θ), where I is the current, B is the magnetic field strength, l is the length of the wire, and θ is the angle between the wire and the magnetic field.

What factors affect the torque on a current carrying wire?

The torque on a current carrying wire is affected by the strength of the current, the strength of the magnetic field, the length of the wire, and the angle between the wire and the magnetic field.

How does torque on a current carrying wire impact the wire?

The torque on a current carrying wire causes it to rotate, which can affect the wire's position and stability. If the wire is not securely anchored, the torque can cause it to move or even break.

What are some real-world applications of torque on a current carrying wire?

Torque on a current carrying wire is used in various devices such as electric motors, generators, and electromagnets. It is also used in applications such as electric vehicles, MRI machines, and particle accelerators.

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