Question

4.2.2 quiz: electromagnetism
question 9 of 10
what is the result of a loop of wire turning between two permanent magnets in a generator?
a. energy from the crank transforms into mechanical energy.
b. the current in the loop of wire stops flowing.
c. the permanent magnets have a current flowing through them.
d. the loop of wire has a current flowing through it.

Explanation:

In a generator, when a loop of wire turns between two permanent magnets, electromagnetic induction occurs. This induces an electric current in the loop of wire. Option A is incorrect as energy from the crank (mechanical energy) transforms into electrical energy, not just mechanical. Option B is wrong because current is induced, not stopped. Option C is incorrect as permanent magnets don't have current flowing through them in this context (they are the source of the magnetic field).

Answer:

D. The loop of wire has a current flowing through it.