Two rails and a rod (magnetic field)

In summary, the problem involves two stiff parallel wires acting as rails to support a light metal rod in a horizontal plane. A magnetic field is present and a current is applied, causing the rod to move. The speed of the rod is determined as a function of time, assuming different levels of friction. The direction of movement is also discussed.
  • #1
lalala_land89
7
0

Homework Statement


Two stiff parallel wires a distance L apart in a horizontal plane act as rails to support a light metal rod of mass m(perpendicular to each rail). A magnetic field B, directed out of the page(textbook page) acts throughtout. At t=0 , wires connected to the rails are connected to a constant current-source and a current I begins to flow through the system. East to the bottom rail, north to the rod , west to the upper rail. Determine the speed of the rod as a function of time a) assuming there's no friction b) there's friction cofficient U c) In which direction does the rod move, east or west , if the current through it is north?


Homework Equations



a) x=vt ? b) mechanical equaction Ffr= U Fn ?? c) west

I'm lost with this. help please.
 
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  • #2
lalala_land89 said:
a) x=vt ?

Why do you think that is the answer? Do you have any thoughts/ideas on how to approach this problem?
 
  • #3
The force on the wire is ILB. Then apply F=ma.
 

FAQ: Two rails and a rod (magnetic field)

What is a magnetic field?

A magnetic field is an invisible force that is created by moving electric charges. It is represented by lines of force that indicate the direction and strength of the field.

How do two rails and a rod create a magnetic field?

The two rails carry an electric current in opposite directions, which creates a magnetic field in between them. The rod acts as a conductor, allowing the electric current to flow through it and further strengthening the magnetic field.

What is the purpose of two rails and a rod in relation to a magnetic field?

The purpose of two rails and a rod is to create a strong and uniform magnetic field. This setup is commonly used in experiments and demonstrations to study the properties of magnetic fields and their interaction with other objects.

Can the strength of the magnetic field be changed by adjusting the two rails and rod?

Yes, the strength of the magnetic field can be changed by adjusting the distance between the two rails and the current flowing through them. Additionally, the material and shape of the rod can also affect the strength of the field.

What are some real-world applications of two rails and a rod in a magnetic field?

This setup is commonly used in industries such as transportation, energy, and manufacturing to generate and control magnetic fields for various purposes. It is also used in medical equipment, such as magnetic resonance imaging (MRI) machines, to produce detailed images of the body.

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