Electromagnetism

What kind of magnet can be turned on and off?

• refrigerator magnet
• electromagnet
• magnetite
• iron

If you wrap more coils around an electromagnet, it will become 

• brighter
• stronger
• weaker
• invisible

A device that converts electrical energy into kinetic energy

• A. electromagnet
• B. electromagnetic induction
• C. electric motor
• D. electromagnetism

This picture best illustrates the construction of a(n)

• magnet

• electromagnet

• series circuit

• parallel circuit

The picture above is an example of what?

• Magnetic field

• Electric field

• Repulsion

• Attraction

What would happen with the magnets in the picture above?

• They would repel

• Nothing

• They would attract

• They would repel and then attract

Electric current flowing through a wire produces

• static electricity
• an open circuit
• a permanent magnet
• a magnetic field

When running a current through a wire, what do the blue lines represent?

• The wire spinning

• A magnetic field that was created

• Electrons leaving

• Electricity

Increasing the number of coils in an electromagnet will _________ the power of the magnet.

• decrease

• increase

• not affect

What conclusion can you draw from this graph?

• As current increases, magnetic strength decreases.

• As current increases, magnetic strength increases.

• As current decreases, magnetic strength increases.

• There is no relationship between current and magnetic strength.