Electricity and Magnetism

The steady flow of electrons through a conductor is

• a circuit

• an electric current

• an insulator

• resistance

When two magnets repel each other which poles are facing each other?

• North and South
• South and North
• North and North
• Positive and Negative

Tags

NGSS.MS-PS2-3

What happens to the magnetic force as an object gets further away from the magnetic field?

• The force increases
• The force decreases
• The force stays the same
• There was no force to begin with

Tags

NGSS.MS-PS2-3

What is a conductor?

• A material that stops electric current from flowing
• A material that allows electric current to flow easily

Which is an example of a conductor?

• Glass
• Plastic
• Copper
• Wood

How do you increase the strength of an electromagnet?

• Decrease the number of batteries and increase the number of coils
• Increase the electric current and decrease the batteries
• You cannot strengthen an electromagnet
• Increase the electric current and increase the number of coils

Tags

NGSS.MS-PS2-3

How are electromagnets different from regular magnets?

• Their strength can be changed

• They can be turned on and off

• Both choices are correct

An electromagnet is a ______________ magnet.

• permanent
• temporary

An electric circuit is ________________.

• a continuous pathway that can carry an electric current
• An open pathway that can carry electric current
• An object that resists the flow of energy
• An object that attracts metal

A flow of electric charges is  ____________.

• an insulator
• a circuit
• a conductor
• an electric current