True or False: If you break/cut a magnet in half, you will ruin the magnet and have no magnets.
False
When a positive particle and a negative particle come close, they will ______________
Attract
Where is the magnetic field the strongest?
Near the poles
An electric current in a metal consists of moving ________________
Electrons
A proton has a ________ charge
Positive
A magnet that uses electricity to generate magnetism is called a(n) _______.
When 2 positive particles come close together, they will _______________
Repel
Give 2 examples of materials that are magnetic
Nickel, Cobalt, Iron
When two objects rub together, one object loses electrons and the other gains electrons:
1. Charging by Friction
2. Charging by Induction
3. Charging by Contact
Charging by Friction
A electron has a ________ charge
Negative
If I have two magnets, and I have the south poles facing each other, what will happen?
The magnets will repel each other
When 2 negative particles come close together, they will _______________
Repel
Give 2 examples of materials that are NOT magnetic
Answers will vary
When a charged object directly touches a neutral object, the (-) charges move to it
1. Charging by Friction
2. Charging by Induction
3. Charging by Contact
Charging by Contact
True or False: Electrons can move, but protons can't move
True
Give 2 examples on how to increase the strength of an electromagnet
Answers will vary
Examples:
Increasing the thickness of the wire
Increase the number of coils
Increase the battery size
Lightning is a large-scale version of _______________ charges moving
Static
How do compasses work?
The Earth is like a giant magnet; in the core is molten iron
When (-) charges separate without contact and are then pulled away from
1. Charging by Friction
2. Charging by Induction
3. Charging by Contact
Charging by Induction
Give 2 ways I could increase the electric force between two charged particles
Answers will vary
Examples:
Increase the charge of the particles
Increase the distance between the two particles
Give 2 examples on how to increase the strength of an electromagnet
Answers will vary
Examples:
Decrease the thickness of the wire
Decrease the number of coils
Decrease the battery size
What are the three particles that make up an atom?
Protons, Electrons, and Neutrons
What is the reason on why materials are magnetic?
The material has an imbalance of electrons
When a glass rod is rubbed with silk, the rod becomes positively charged due to the transfer of _________________ to the ______________
Electrons to the silk
The electric force between two positive point charges is F with a separation distance of d. The graph that BEST represents the relationship between F and d is:
1