Electromagnets Quiz

What creates the magnetic field in an electromagnet?

• Wind power

• Solar energy

• Permanent magnet

• Electric current

How can the magnetic strength of an electromagnet be altered?

• By changing the temperature

• By varying the amount of electric current

• By changing the color

• By increasing the humidity

What is the polarity of an electromagnet determined by?

• Amount of sunlight

• Number of coils

• Direction of the electric current

• Type of metal used

Where are electromagnets commonly used?

• In clothing stores

• In waste yards

• In cooking appliances

• In swimming pools

What type of devices use electromagnets?

• Electronic devices only

• Mechanical devices only

• Electromechanical and electronic devices

• None of the above