Electric charges and magnets

​Electromagnetism

​LO: Describe how magnets and electric charges are related

​Recap on magnetic field

​Magnetic field is ________around magnet where there is water force/magnetic force

​Current is a flow of water/electric charge

​How do current create magnetic fields?

​Moving charges and magnetic fields

​How do you increase the strength of magnetic field around an electric wire?

​1.___________________

2___________________

3___________________

4___________________

Multiple Select

Which of the two below result in an attractive force?

• A positive charge and a negative charge

• Two negative charges

• Two south poles

• A north pole and a south pole

• Two postive charges

Multiple Choice

Surrounding each magnetic is an invisible force field called

• Gravity

• A magnetic field

• An electric field

• The Force

Multiple Choice

To decrease the strength of a magnetic field around an electromagnet, we must

• increase the number of coils

• increase the size of the iron core

• decrease the size of the iron core

• decrease the number of coils

Multiple Choice

What is the cause of electricity?

• Magnetism

• Gravity

• Moving electrons

• Lightning

Multiple Choice

Where does a magnet have the strongest magnetic field?

• at the poles

• in the middle

• only at the north pole

• only at the south pole

Multiple Choice

A material that does not allow electric charges to flow freely through them (ex.- wood, rubber) is called a(n)....

• conductor

• insulator

• frictionator

• magnet

Multiple Choice

A material that allows electrical energy to flow through it easily (ex.- copper wire, metal) is called a(n)...

• conductor

• insulator

• frictionator

• magnet

Multiple Choice

If two objects, one with a negative charge and one with a positive charge, come into close contact with one another, what would you expect to see happen?

• They will repel.

• They will attract.

• They will divorce.

• They will unite.

Multiple Choice

If two objects, both with negative charges, come into close contact with one another, what would you expect to see happen?

• They will repel.

• They will attract.

• They will divorce.

• They will unite.

Multiple Choice

Magnetism is a force of ____________________________ that occurs between two _____________ objects.

• attraction or repulsion, magnetic

• external or internal, magnetic

• external or repulsion, electronic

• attraction or internal, electronic