A coil is moved through a magnetic field as shown in Figure 22.48. The field is

Question

A coil is moved through a magnetic field as shown in Figure 22.48. The field is uniform inside the rectangle and zero outside.

What is the direction of the induced current and what is the direction of the magnetic force on the coil at each position shown?

(a)
current
---Select--- clockwise no current counterclockwise
magnetic force
---Select--- to the left no force to the right

(b)
current
---Select--- counterclockwise clockwise no current
magnetic force
---Select--- to the left to the right no force

Explanation / Answer

a. No induced current (no field), no force
b. Curretn induced in clockwise direction (Lenz's law); force to the left.
c. No induced current (uniform field); no force
d. Current induced in counter-clockwise direction (Lenz's law), force towards the left.
e. No induced current (no field), no force

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