Question
In a simple electric generator, a conducting loop of wire is placed in a magnetic field. The loop of wire is then rotated. Why is it necessary for the wire to be rotated?
A.
Its motion through the air transforms heat into magnetism.
B.
Its motion when it moves upward changes gravity into magnetism.
C.
Its motion through the magnetic field creates a current in the wire.
D.
Its motion removes the magnetic field by using up the magnetic energy.
A.
Its motion through the air transforms heat into magnetism.
B.
Its motion when it moves upward changes gravity into magnetism.
C.
Its motion through the magnetic field creates a current in the wire.
D.
Its motion removes the magnetic field by using up the magnetic energy.
Answers
GPT-4o mini
The correct answer is:
C. Its motion through the magnetic field creates a current in the wire.
When the conducting loop rotates in a magnetic field, it cuts through magnetic field lines, which induces an electromotive force (EMF) according to Faraday's law of electromagnetic induction. This induced EMF causes a current to flow in the wire, thereby generating electricity.
C. Its motion through the magnetic field creates a current in the wire.
When the conducting loop rotates in a magnetic field, it cuts through magnetic field lines, which induces an electromotive force (EMF) according to Faraday's law of electromagnetic induction. This induced EMF causes a current to flow in the wire, thereby generating electricity.