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- 1. Multiple Choice
What happens when an electric current flows through a wire?
The wire begins to spin.
Nothing happens.
A field of gravity is created around the wire.
A magnetic field is created around the wire.
- 2. Multiple Choice
What does this image show?
Parallel circuit
Series circuit
Magnet
Electromagnet
- 3. Multiple Choice
A _____________ transforms mechanical energy into electrical energy.
generator
electromagnet
circuit
magnetic field
- 4. Multiple Choice
Increasing the number of coils in an electromagnet will _________ the power of the magnet.
decrease
increase
not affect
- 5. Multiple Choice
What three minerals are attracted to a magnet?
Gold, copper, cobalt
Cobalt, aluminum, silver
Iron, copper, aluminum
Iron, nickel, cobalt
- 6. Multiple ChoiceThis is a picture of a simple electromagnet. How can the electromagnet be made stronger?Add more coils of wire to the nail.Use a smaller battery.Reverse the poles of the magnet.Remove all the coils and the nail.
- 7. Multiple Choice
What happens when an electric current flows through a wire?
The wire begins to spin.
Nothing happens.
A field of gravity is created around the wire.
A magnetic field is created around the wire.
- 8. Multiple Choice
The area of magnetic force around a magnet is known as its ____________.
magnetism
magnetic current
magnetic field
electric current
- 9. Multiple Choice
What type of core is best for electromagnets?
Steel
Iron
Plastic
Copper
- 10. Multiple Choice
What conclusion can you draw from this graph?
As current increases, magnetic strength decreases.
As current increases, magnetic strength increases.
As current decreases, magnetic strength increases.
There is no relationship between current and magnetic strength.
- 11. Multiple ChoiceIf the distance is reduced by half, what happens to the force?QuadruplesDoublesTriplesReduces by half
- 12. Multiple ChoiceThe Electric Force is strongest when charges are...close togetherfar apartthe electric force is constant everywhere
- Answer choicesTagsAnswer choicesTags