Question

Daniela is investigating the relationship between magnetism and the movement of electrical charge. She creates a homopolar motor, as shown in the diagram. A homopolar motor is a direct current electric motor that creates constant circular motion. When Daniela connects the copper wire with the battery and the magnet, a complete circuit is formed. This causes the motor to spin. What is the cause of the spinning motor?

#1 point

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battery

copper wire

magnet

The copper wire is being repelled by the magnet.

The copper wire is being attracted to the magnet.

The magnetic field of the magnet interacts with the magnetic field created by the Ocurrent.

The cument running through the magnet interacts with the current running through the battery

Answer 1

The cause of the spinning motor is:

**The magnetic field of the magnet interacts with the magnetic field created by the current.**

In a homopolar motor, the interaction between the magnetic field from the magnet and the magnetic field produced by the current flowing through the copper wire creates a force (Lorentz force) that causes the wire to rotate.