Electromagnetism

What is NOT required for a circuit to work?

• switch
• energy source
• path
• resistor or load

An electric current is

• a path for electricity to flow
• how many protons are moving through a wire
• a measure of how much electricity is flowing
• a measure of how much water is flowing

Which of the following is a series circuit?

• 
• 
• 
• 

Doubting Dennis doesn't believe in electromagnetism so he makes an electromagnet to prove his teacher wrong. To his surprise, the electromagnet works and he's able to pick up metal objects with it. Even still, he's not satisfied with his electromagnet because it's very weak. What can he do to make it stronger?

• use a plastic nail
• use a stronger battery
• wrap the wire around the nail fewer times
• glue the wire to the nail

What would happen to a bar magnet if it were cut in half?

• Its magnetism would be destroyed

• One half would be a north pole and one half would be a south pole

• Both halves would be north poles

• Each half would have a north and a south pole

In a closed electrical circuit, what evidence is there to show that the circuit is working?

• it has a new battery
• a closed switch
• connected wires
• a lightbulb lighting up

Which of the following would increase the strength of an electromagnet?

• adding a bulb to the circuit
• removing the core
• increasing the number of coils of wire
• decreasing the current

Tags

NGSS.MS-PS2-3

If a material does not allow current to flow easily, what is it called?

• electrical conductor
• electrical insulator
• static electricity
• electric discharge

What type of device converts mechanical energy to electrical energy?

• ferromagnet
• motor
• generator
• electromagnet

Which of the following are NOT an energy source for a circuit?

• windmill powered generator
• car battery
• motor
• water powered generator