Electricity and Magnetism Quiz

What is required for a circuit to work?

• A battery, some wires, and a device that uses electricity

• Only a battery

• Only some wires

• Only a device that uses electricity

What is the term used for the flow of electricity through a wire?

• Direct flow

• Alternating flow

• Conventional flow

• Magnetic flow

What is a permanent magnet?

• A magnet that can be turned off

• A magnet that always works

• A magnet that only works sometimes

• A magnet that needs electricity to work

What happens when the same poles of two magnets are brought together?

• They attract each other

• They repel each other

• They cancel each other out

• They lose their magnetism

What is created when a wire is wrapped around several times and a current is passed through it?

• A permanent magnet.

• An electromagnet.

• A battery.

• A resistor.

What is the main idea behind the website and app mentioned in the text?

• To provide free courses

• To focus specifically on math and science

• To offer professional certifications

• To sell educational products

What is the term used to describe the spinning force on the armature of an electric motor?

• A. Torque

• B. Current

• C. Polarity

• D. Commutator

What is the function of the stator in an electric motor?

• A. To create a magnetic field that interacts with the armature to produce rotation.

• B. To reverse the polarity of the electromagnet.

• C. To increase the torque of the motor.

• D. To reduce the speed of the motor.

Which part of an electric motor allows the current to flow in alternating directions?

• A. The stator

• B. The armature

• C. The commutator

• D. The electromagnet

What is the role of the armature in an electric motor?

• A. To create a magnetic field that interacts with the stator.

• B. To reverse the polarity of the electromagnet.

• C. To spin rapidly, creating the power to turn the fan blades.

• D. To allow the current to flow in alternating directions.