Electric Charges and Electromagnets

Multiple Choice

Electric Induction requires contact to create charges

True or false?

• True

• False

Multiple Choice

What is this?

• Magnet

• Generator

• Electromagnet

• Motor

Multiple Choice

How are electromagnets different from magnets?

• 
  magnets can be turned on/off

• you can turn an electromagnet on/off

• magnets have a North and South pole

• 
  magnets are more powerful

Multiple Choice

In order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.

• wire, iron, electric

• iron, electric, wire

• electric, wire, iron

Multiple Choice

What would happen to the magnetism of the screw when the electric current is lost?

• 
  The screw would no longer be magnetic.

• The screw would become a stronger magnet.

• The screw would hold the same magnetic charge.

• The screw would become a weaker magnet.

Multiple Choice

What is the process of producing an electric current by moving a conductor through a magnetic field?

• making an electromagnet

• conduction

• electromagnetic induction

• field generation

Multiple Select

Select all the ways that an electromagnet can be made stronger —

• 
  adding more battery power

• 
  increasing the size/quality of the iron core

• changing the direction of the current moving through the wire

• 
  adding more loops of wire/coils

Multiple Choice

What do the lines around this magnet represent?

• Magnetic Field

• Electric Field

• South Pole

• North Pole

Multiple Choice

What does switching/swapping polarity mean for electromagnets?

• Turning off and on quickly

• Switching the north and south pole

• Stopping the electric current

• Pointing north

Multiple Choice

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

• magnetism and radiant

• electricity and magnetism

• electricity and thermal

• magnetism and thermal

Multiple Choice

What do generators create?

• Mechanical energy

• Electrical energy

• Kinetic energy

• Thermal energy

Multiple Choice

What do motors create

• Electrical energy

• Mechanical energy

• Thermal energy

• Potential energy