AKS 10C - Electromagnetism and Motors

Multiple Choice

Permanent magnets are made out of which materials?

• Cobalt, Nickel, and Iron

• Copper, Chromium, and Cobalt

• Gold, Silver, and Platinum

• Copper, Nickel, and Iron

Multiple Choice

What component becomes a temporary magnet when electricity is flowing through the circuit?

• iron nail

• copper wire

• battery

• switch

Multiple Choice

Sophia made an electromagnet but it was very weak. How can she make it stronger?

• take away the battery

• wrap the wire loosely

• use less copper wire

• coiled more copper wire

Multiple Choice

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Remove all the coils and the nail.

• Use a smaller battery.

• Reverse the poles of the magnet.

• Add more coils of wire to the nail.

Multiple Choice

How are electromagnets different from magnets?

• magnets have a North and South pole

• you can turn an electromagnet on/off

• magnets are more powerful

Multiple Choice

Which component provides the energy or the power source to run the electromagnet?

• Iron nail

• wire

• Switch

• Battery

Multiple Choice

What would increase the strength of an electromagnet?

• Changing the direction of the current

• Increased the amount of electricity that flows through the wire.

• Inserting a wooden core inside the coil

• Decreasing the number of coils of wire

Multiple Choice

You can make an electromagnet stronger by: having a __________________core inside the wire.

• smaller core

• larger core

• greener core

• water core

Multiple Choice

What are the components of the electromagnet?

• copper wire, iron nail, and a wooden stick

• copper wire, iron nail

• copper wire, iron nail, and a battery

• Copper wire, paper and a battery

Motors and Generators Lesson

Multiple Choice

What two forces are required for generators and electric motors to work?

• magnetism and thermal

• electricity and magnetism

• electricity and thermal

• magnetism and radiant

Multiple Choice

What did Faraday discover about induction?

• That a changing magnetic field induces a current in a conductor.

• That electricity and magnetism were related when he noticed a current carrying conductor deflected the compass of a needle.

• That the Earth's magnetosphere deflected from the Sun known as solar winds.

• That alternating current could be manipulated with transformers.

Multiple Choice

Motors are devices that convert ____ energy into ____ energy.

• electrical; mechanical

• chemical; mechanical

• mechanical; electrical

• potential; kinetic

Multiple Choice

This picture is an example of a ___________.

• Step Up Transformer

• Motor

• Step Down Transformer

• Generator

Multiple Select

Choose all of the motors.

Multiple Choice

Generators are devices that convert _____ energy into _____ energy.

• mechanical; electrical

• potential; kinetic

• chemical; mechanical

• electrical; mechanical

Multiple Select

Choose all of the generators.

Multiple Choice

A transformer actually transforms

• generators into motors

• magnetic field lines

• voltage

Multiple Select

Choose all of the transformers.

Multiple Choice

Which best describes how a motor works?

• When a fan blows on a wire, it causes it to spin, creating a force.

• When a fan blows on a wire, it causes it to spin, creating an electrical current.

• When a wire that carries electrical current is placed in zero gravity, the wire experiences a force.

• When a wire that carries electrical current is placed in a magnetic field, the wire experiences a force.

Multiple Choice

What is produced by moving a permanent magnet through a coil of copper wire?

• light

• electricity

• sound

• electromagnet

Multiple Choice

In an electric motor, the energy transformation begins as ---

• electrical and becomes chemical

• mechanical becomes electrical

• electrical and becomes mechanical

• mechanical and becomes chemical

Multiple Choice

What energy do you put IN to a generator?

• Thermal

• Mechanical

• Electrical

• Potential

Multiple Choice

What type of energy comes OUT of a generator?

• Electrical

• Potential

• Mechanical

• Thermal

Multiple Choice

Generators are devices that convert _____ energy into _____ energy.

• mechanical; electrical

• potential; kinetic

• chemical; mechanical

• electrical; mechanical