Term 3 Week 7 2020

 Homework:

• Ex 6A, p.188-196, Electric Fields
• Ex 6B, p.200-201, Current & Voltage
• Ex 6C, p.205-214, Series & Parallel Electric Circuits - V = IR
• Ex 6E, p. 222-224, F = Bqv
• Ex 6D, p. 218-219, F = BIL & F = BILsin(θ)




Magnetic Fields






Magnets 

Electromagnet





Electromagnet Used for Scrap Metal Crane



Levitating with Electromagnets


Exploding Cans with Electromagnets


Magnetic Fields




Right Hand Screw Rule





Right Hand Slap Rule



Right Hand Slap (Palm) Rule


Lorentz Force (F = Bqv)


Lorentz Force





Lorentz Force (F = BIL)










V = BvL

Note:
• emf is an old term for voltage and stands for electromotive force
• E is also used by enginers for Voltage (not energy)


D.C. Motor




D.C. Motor How it Works





Brushless D.C. Motor How it Works







Faraday Cage




Tesla Coil & Faraday Cage

Term 3 Week 4 2020

 Homework:

• Ex 6A, p.188-196, Electric Fields
• Ex 6B, p.200-201, Current & Voltage
• Ex 6C, p.205-214, Series & Parallel Electric Circuits - V = IR

Current

Current is the rate of flow of Charge

I = Δq/Δt

Current

Voltage

Voltage (Potential Difference) is the change in energy (work done) to each coulomb of charge between two points on a circuit, or two points across an electric field

Circuit Symbols

Ohm's Law

Ohm's Law PhET application

D.C. Circuit Construction Kit PhET Application

D.C. Circuit Lab PhET Application

Ohm's Law

Series & Parallel Circuits

Series & Parallel Circuits

Electric Power

P = IV

P = I2R  ← using Ohm’s Law V=IR substitution

P = V2/R←using Ohm’s Law I=V/R substitution

Term 3 Week 2 2020

Homework:

• Ex 6A, p. 188-196, Static Electric Fields F=Eq, E=V/d, Ep=Vq & Ep=Eqd

PhET - Charge & Electric Fields - App

Basics of Electric Charge

Definition of an Electric Field:

“Any region of space where a charge feels a force.”

A positive charge will feel a force with the electric field direction

A negative charge will feel a force against the electric field direction

Fe = Eq

Electric Field

Electric Potential (Voltage)

What is Voltage?

Uniform Electric Field

E = V/d

Uniform Electric Fields

Uniform Electric Field

E = V/d

E: Electric Field (Vm-1 or NC-1 depending on the context

used)

Electric Force

Fe = Eq

Fe: Electrical Force (N)

q or Q: Charge (C)

Electrical Potential Energy

As the charge falls through the Electric Field, the electrical potential energy transforms into kinetic energy.

Ek = Ep

½ mv2 = Vq

Electron Gun

(Cathode Ray Tube)

A Tube Screen TV is an Electron Gun

Cathode Ray Tube and how it works

Term 2 Week 11 2020

Homework

• Ex 5A, p. 151-155, Models of the Atom
• Ex 5B, p. 160-171, Radioactivity
• Ex 5C, p. 175-182, Nuclear Reactions

Nuclear Reactions:

• Conservation of Atomic Number
• Conservation of Nucleon Number
• Conservation of Mass-Energy E = Δmc2

E = Δmc2

Nuclear Fusion in the Sun

Binding Energy comes from the change in mass from individual nucleons to being combined into a nucleus. This is energy lost by the nucleons joined together in a nucleus and must be returned in order to separate the nucleons

E = Δmc2

Element formation in Stars Nuclear Fusion

Binding Energy Per Nucleon

Mass Per Nucleon

Nuclear Reactions

Fission Fusion and Radioactive Decay

Fission & Fusion

Natural Nuclear Fission Reactor

Term 2 Week 10 2020

Homework

• Ex 3D, p.66--67, Wave Properties
• Ex 3E, p.69-70, Diffration
• Ex 3F, p.3F, p.73-75 Superposition
• Ex 3G, p.76-78 Two Point Source Interference
• Ex 3H, p.81-83 Waves on a String
• Ex 3I, p.85-87 Wave Refraction on a String
• Ex 5A, p. 151-155, Models of the Atom
• Ex 5B, p. 160-171, Radioactivity
• Ex 5C, p. 175-182, Nuclear Reactions

Models of the Atom

History of the Atom

Models of the Atom Timeline

Discovery of the Electron: Cathode Ray Tube Experiment

Discovery of the Nucleus: Rutherford's Gold Foil Experiment

Charge of an Electron: Millikan's Oil Drop Experiment

Atomic Structure: Discovery of the Neutron

Parts of the Atom

Isotopes

Isotopes are versions of an atom or an element that have the same number of protons, but different numbers of neutrons

What are Isotopes?

Radioactive Decay

Alpha, Beta & Gamma Radiation

• Alpha particles are emitted by a larger nucleus that has too many Protons
• Beta particles are emitted by a nucleus that has too many Neutrons
• Gamma photons are emitted by a nucleus that has too much Energy (is in an exited state)

• PhET Alpha Decay app can be found here
• PhET Beta Decay app can be found here

Alpha Decay

Beta Decay

Radiation

Types of Radiation

Is radiation dangerous?

The Most Radioactive Places on Earth

Millisieverts and Radiation - Sixty Symbols