SCI102AX: Unit 5 Review (Chapter 9)

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

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

What is an insulator?

• A material that DOES NOT allow electric current to flow
• A material that DOES allow electric current to flow

Which is an example of an insulator?

• Rubber
• Copper
• Iron
• Steel

What is current electricity?

• Current electricity involves a continuous flow of neutrons
• Current electricity involves a continuous flow of protons
• Current electricity is a single transfer of electrons
• Current electricity is a steady flow of electrons

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

How are electromagnets different from regular magnets?

• Their strength can be changed
• They can be turned on and off
• Their polarity can be reversed
• All choices are correct

What will happen to the other bulbs in the circuit if one bulb goes out?

• The other bulbs will go out
• The other bulbs will get brighter
• The other bulbs will get dimmer
• They will flash on and off

What will happen when a light bulb is removed from the circuit below?

• The remaining bulbs will go out

• The remaining bulbs will dim.

• The remaining bulbs will stay lit.