|Jun27-12, 07:42 AM||#1|
Magnetic field question? is this correct?
1. The problem statement, all variables and given/known data
The conductive bar CD with a length of 20 cm and resistance R, moves with speed v=5 m/s. The magnetic field is perpendicular with the plan and the induction is B=2 T.
The mass of the object in the figure is m=80 grams and g=10 m/ s^2
a) find the direction and the intensity of the induced current that moves in CD
b) The resistance of this bar
2. Relevant equations
3. The attempt at a solution
the resultant force on the bar is zero.This means the only force acting on the bar is the magnetic force F=B*i*l.
Now we have the Tension= mg-ma but acceleration is zero so we write
Magnetic force = Force on the string
I know how to solve this now
The magnetic force will have the direction <---- based on the figure and the induced current the direction from left to right .
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