Problem 29.3: Find the force on a loop

Please wait for the animation to completely load.

A loop with a resistance of 200 W is pulled at constant velocity through a region where there is a magnetic field of 2 T out of the screen and into a region of no magnetic field (position is given in meters and time is given in seconds). Restart.

During the time shown in the animation,

  1. What are the direction and magnitude of the current in the loop?
  2. A force is necessary to pull the loop out of the magnetic field. Why? (Draw a free-body diagram of the loop and explain the origination of each force.)
  3. Find the magnitude of the force that was exerted by the hand on the loop in the animation.
  4. Describe the subsequent motion of the loop if the same force continues to act on the loop when it is in the region of no magnetic field.

Problem authored by Melissa Dancy.

Physlets were developed at Davidson College and converted from Java to JavaScript using the SwingJS system developed at St. Olaf College.

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Open Source Physics - EJS Modeling
Physlet Physics
Physlet Quantum Physics
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