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Square Loop Of Wire True or False

  • Thread starter shimizua
  • Start date
  • #1
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Homework Statement


A square loop of wire with a small resistance is moved with constant speed from a field free region into a region of uniform B field (B is constant in time) and then back into a field free region to the right. The self inductance of the loop is negligible.

http://capa-new.colorado.edu/msuphysicslib/Graphics/Gtype64/prob24_loop1.gif

A) Upon entering the field, a clockwise current flows in the loop.
B) While the loop is entirely in the field, the emf in the loop is zero.
C) Upon leaving the field, a clockwise current flows in the loop.
D) When entering the field the coil experiences a magnetic force to the right.
E) When leaving the field the coil experiences a magnetic force to the left.

Homework Equations


k so i assume we use the right hand rule for all of these.


The Attempt at a Solution


The only one that I know for sure to be right is B. Other then that I am a little confused. if you can just give me some hints that would help greatly
 

Answers and Replies

  • #2
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Please someone help me
 
  • #3
marcusl
Science Advisor
Gold Member
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Hint: Look up Lenz's law in your book. It states that the current will flow in a direction to oppose the applied field. (You'll need your right-hand rule to figure it out). Lenz's law will also tell you the answer to D, E if you think about it.
 

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