In this problem, you will use Lenz\'s law to explore what happens when an electr

Question

In this problem, you will use Lenz's law to explore what happens when an electromagnet is activated a short distance from a wire loop. You will need to use the right-hand rule to find the direction of the induced current.

(PartA): When the switch is open, which of the following statements about the magnetic flux through the wire loop is true? Assume that the direction of the vector area of the wire loop is to the right.

a. There is no magnetic flux through the wire loop.
b. There is a positive flux through the wire loop.
c. There is a negative flux through the wire loop.

(PartB): What is the direction of the induced current in the wire loop (as seen from the left) when the switch is open?

a. There is no induced current.
b. The induced current is clockwise.
c. The induced current is counterclockwise.

(PartC): Now the switch on the electromagnet is closed. What is the direction of the induced current in the wire loop immediately after the switch is closed (as seen from the left)?

a. There is no induced current.
b. The induced current is clockwise.
c. The induced current is counterclockwise.

Explanation / Answer

a) when the switch is open, no magnetic flux through the wire loop

b) when the switch is open, no induced current through the wire loop

c) when the switch is closed, induced current is counter-clockwise in the wire loop.

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