Static Electricity and Magnetism

Question 1

What is electricity?

Answer 1

• All phenomena caused by (+ & -) charges
• A form of energy (Used to power machines, and our brains)

Question 2

Positive Charge

Answer 2

More protons than electrons

Question 3

Negative charge

Answer 3

More electrons than protons

Question 4

Charge of single proton or electron

Answer 4

1.602 x 10 ^-19

Question 5

Number of protons or electrons in one coloumb:

Answer 5

6.25 x 10¹⁸

Question 6

Electrostatic Electricity,

What does static mean in electron static?

Answer 6

• It is about the movement of charges and electrons.
• Study related to electrical charges at rest
• Only electrons move
• Charged materials recover their neutral state very quickly and will be evenly charged

Question 7

Law of Charges

Opposites, Sames

Answer 7

• Opposites attract
• Sames repel

Question 8

Define Conductors

Answer 8

A material or object that allows for the free flow of electrical charge

Question 9

Define Insulators

Answer 9

A material or object that impedes the free flow of electrical charge.

Question 10

Specifically, What type of electron moves?

Answer 10

Valence Electrons

This inbalance results in objects losing or gaining electrons and thus obtaining a charge.

Question 11

Two Functions of Electrons

Answer 11

1. leave or enter an object creating a net charge on the object
2. move within an object that is a conductor distributing charge within the object

Question 13

What happens if the charged object is brought very close to the neutral dipole?

Answer 13

A spark could occur between the two object, this electrical discharge neutralizes the surroundings.

Question 14

Force between two objects: variables?

Answer 14

• Distance (inversely porportional)
• Amount of charge (directly porportional)

Question 15

Coloumb Constant

Answer 15

9 x 10⁹Nm²/C ²

Question 16

Review Coloumbs Law

Answer 16

Slide 39, + Practice examples

Question 17

What is a force?

Answer 17

A push or pull that causes a change in motion.

Question 18

What is magmnetism?

Answer 18

• Phenomena caused by magnets
• Force like gravity or the attraction and repulsion of electrostatc charges

Question 19

What is a magnet?

Answer 19

Object that can attract (exert force)

Question 20

Ferromagnetic Materials:

Answer 20

• Iron
• Cobalt
• Nickel

unpaired electrons in different energy levels

Question 21

Magnets (Poles)

Answer 21

• Every magnet has 2 poles, North and South
• All magnets have both
• Magnetic North = Geographic South
• Like poles repel
• Opposite poles attract
• Magnetic Force and Distance are Inversely porportional

Question 22

Earths Magnetic Field is caused by:

Answer 22

Moving molten iron in the Earth’s outer core.

Question 23

Where does the Aurora occur?

Answer 23

The poles of the Earth

Question 24

Types of Substances:

Answer 24

• Non Magnetic
• Magnetic
• Ferromagnetic

Question 25

Non Magnetic

Answer 25

Not attracted to or repelled by a magnet

Question 26

Magnetic

Answer 26

Attracted to or repelled by a bar magnet

Question 27

Ferromagnetic

Answer 27

Attracted by a magnet, can be temporarily magnetized

Iron, Cobalt, Nickel

Question 28

Dipole Field

Answer 28

From North to South

Question 29

What is electromagnetism?

Answer 29

• The interaction between electricity and magnetism
• Electrical currents can create a magnetic field
• Conventional current travel

Question 30

Review left hand rule:

Answer 30

Solenoids and Magnetism on facile

Question 31

Advantages of electromagnetic fields:

Answer 31

• Switch (on and off)
• Stronger (strength can be altered)
• Polarity can be altered (move back and forth)
• Motor

Question 32

What 3 Variables Increase the Strength of the Solenoid?

Answer 32

1. Wire length (number of coils)
2. Core (ferromagnetic material)
3. Voltage