Electromagnets in a Circuit

Which part of the motor is magnetized and interacts with the other components to create movement?

• Coil of wire (electromagnet)

• Plastic cup

• Rubber bands

• Sandpaper

When two north poles of two magnets are brought close to each other, what happens to the magnetic field?

• They push apart.

• They pull together.

• They do nothing.

• They break.

What likely happens to the properties of the coiled wire when it’s connected to the battery in a closed circuit?

• The coiled wire becomes magnetized.

• The coiled wire becomes insulated.

• The coiled wire dissolves in the battery.

• The coiled wire rusts immediately.

What is the key feature of an electromagnet?

• It is a type of magnet where the magnetic field is produced by an electric current.

• It only works during the night.

• It’s a permanent magnet unaffected by electric currents.

• It’s a device that stores chemical energy.

When reversing the battery connections in a circuit, what should you observe about the compass needle?

• The needle will move in the opposite direction.

• The needle will stay still.

• The needle will disintegrate.

• The needle will change color.

What form of energy does a battery represent before it is connected to a circuit?

• Potential energy

• Kinetic energy

• Thermal energy

• Magnetic energy

What is it called when energy changes from electrical energy to kinetic energy in a motor?

• An energy transformation

• An energy cancellation

• Magnetic destruction

• Resistance increase

The spinning coil motor is similar to other electrical systems studied during this unit in that it:

• uses electromagnetic principles

• operates without electricity

• is powered by solar energy

• functions only in a vacuum

What is the function of an electric motor?

• It transforms electrical energy into kinetic energy.

• It operates using a gas engine.

• It requires an extensive cooling system.

• It generates light instead of motion.

What is energy transfer?

• Energy moving between two objects or systems (Correct)

• Energy changing form within one object or system

• Energy being created

• Energy being destroyed