Term 3 Week 5 2019

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)










Faraday Cage




Tesla Coil & Faraday Cage

Term 3 Week 4 2019

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 2019

Homework

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

Definition of an Electric Field:

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

Electric field lines are generated by charges. The closer the field lines are together, the stronger the electric field

PhET simulation of Charges, Force and Electric Field lines

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 Charge

Voltage (Potential Difference)

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

Voltage (Potential Difference)

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

V = ΔE/Q

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 10 2019

Homework

• Ex 3I, p.85-87 Wave Refraction on a String
• Ex 3B, p. 47-52, Refraction
• Ex 3C, p.56-63, Lens
• Ex 3A, p.37-44 Curved Mirror

Lens/Mirror Simbucket - app link

Plane & Curved Mirrors

Lenses

Ray Diagram

Comparing Lens & Mirror

Using Descartes formula for the Lens & Mirror

Term 2 Week 9 2019

Homework

• Ex 3I, p.85-87 Wave Refraction on a String
• Ex 3B, p. 47-52, Refraction

Snell's Law & Critical Angle

The Critical Angle occurs when a wave is attempting to pass from a medium with a slower speed to that of a higher speed 

low v → higher v

low 𝜆 → higher 𝜆

high n → lower n

The Critical angle is the incident angle where the refracted angle equals 90 degrees

• Any incident above the Critical angle will prevent any refraction occuring and Total Internal Reflection will occur
• The Critical angle is can be found by sin(𝜭c) = n2/n1

FibreOptic Cables: How they work?

Total Internal Reflection T.I.R.

What Happens to Lazers Underwater?

Term 2 Week 8 2019

Homework

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

Phy 2.5 AS 91172

Atomic & Nuclear Physics Assessment this Thursday 20th June Period 4

Term 2 Week 6 2019

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

Mass Energy Equivalence

Nuclear Reactions

Fission Fusion and Radioactive Decay

Fission & Fusion