Unit 4: Magnetic and Electric Forces Flashcards
What are 3 subatomic particles that are atoms made of?
Protons
Neutrons
Electrons
In electric force, what are 2 types of charges?
Positive & Negative
Which are attracted? Which repel one another?
- Positive and Negative
- Positive - Positive, Negative - Negative
Which way do the electric field lines of a positive atom point? What about a negatively charged atom?
A positive atom points outward and a negative atom points inward.
What 2 things does the size of the electric force depend on?
The amount of charge and the distance between the charges.
What are 3 ways you can charge an object?
Friction, Conduction, Induction
Which one occurs by “wiping” from one object to another?
Friction
Which one is transferred by direct contact?
Conduction
What is the difference between a conductor and an insulator? Give an example of each.
In a conductor, electricity can move through it easily. (Direct Contact); Copper
In an insulator, electricity cannot move as easily.; Plastic
Conduction
Transfer of electricity through direct contact.
Electrons move from one object to another through direct contact.
Friction
Electrons are “wiped” from one object onto another
Induction
Charges in an uncharged object are rearranged without direct contact with a charged object.
2 poles of a magnet
North and South
Which one repels? Which one attracts?
- North - North
South - South - North & South
What happens when a magnet is cut in half? Does it become on the south pole and one north pole, or does it become a completely new magnet?
When a magnet is cut in half, it turns into 2 magnets both having a north and south pole.
