Energy

Which of the following would be a good conductor for a closed circuit

• plastic
  plastic
• rubber
• copper
• wood

Where is a magnetic field the strongest? 

• at both poles
• in the middle
• at the south seeking pole
• at the north seeking pole

A material that conducts electric current poorly is called...

• a circuit
• a charger
• a conductor
• an insulator 

In a series circuit what would happen to the other light bulbs if one light bulb burns out? 

• The other light bulbs will remain on
• The other light bulbs will be brighter
• The other light bulbs would be dimmer
• The other light bulbs would go out

How can the strength of an electromagnet be increased? 

• By using less current
• by using a smaller magnet
• by using a smaller magnetic core
• by using more turns in the metal coil

What is produced when a coiled wire is spun around a magnet? 

• electrical energy
• magnetic energy
• mechanical energy
• geothermal energy

A circuit is made up of a battery, a light bulb, a switch, and connecting wires.  When the switch flips, the bulb lights up.  What was the switch's job?

• The switch provided light energy to the bulb
• The switch produced the electricity for the circuit
• The switch completed the circuit
• The switch had no effect on the circuit.

Magnets and electricity have something in common.  What is it? 

• Both can provide a large shock
• Both have protons, electrons, and neutrons
• Both have forces that either push or pull
• Both are alternate fuels for cars

A substance that allows heat, light, sound, or an electric charge to run through it is called...

• a reflector
• a nonconductor
• an insulator
• a conductor

If the north pole of one magnet is brought near the south pole of another magnet, what will happen?

• Both magnets will break
• Nothing 
• They will attract
• They will repell