Metalrod and magnetic field

  • #1

Homework Statement


mass=m
length=l
initialspeed=v0
magneticfield=B
Resistor=R

Homework Equations


A metal rod of mass m and length l slides on two parallell frictionless rails.
A uniform magnetic field is directed perpendicular to the plane of the rails.
There is no external agent applying a force to the rod.

Show that v(t) = v0e^t/T
where T = mR/(Bl)²

The Attempt at a Solution



I dont know where to start. Shall I construct a differentialequation including dt and dA? If not the solution I would be greatful for some hints.
 

Answers and Replies

  • #2
siddharth
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