Lenz's Law and Current's Direction

  • #1

Homework Statement



A loop rests in the xy plane. The z axis is normal to the plane and positive upward. The direction of the changing flux is indicated by the arrow on the z axis. The diagram that correctly shows the direction of the resultant induced current in the loop is

tip30.gif


a. (1)
b. (2)
c. (3)
d. (4)
e. (5)


Homework Equations



emf = - [d(magnetic flux)]/dt

The Attempt at a Solution



In Figure 4, the magnetic flux is increasing in the -z-direction. From Lenz's Law, there is an opposition to this change, so the induced current will be counter-clockwise, which corresponds to the +z-direction?

Thanks.
 

Answers and Replies

  • #2
Doc Al
Mentor
45,030
1,329
Exactly right.
 

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