Wednesday, 25 September 2019

Term 3 Week 10 2019

Revision for NCEA Level 2 Physics

NCEA Level 2 Physics – Last Minute Exam Tips | StudyTime NZ

Waves | NCEA Level 2 Physics Strategy Video | StudyTime NZ

Mechanics | NCEA Level 2 Physics Strategy Video | StudyTime NZ

Electricity and Electromagnetism | NCEA Level 2 Physics Strategy Video | StudyTime NZ

Monday, 16 September 2019

Term 3 Week 7 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)
Ex 6F, p. 227-228, V = BvL

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

Electromagnetic Induction
Levitating Barbeque

Tuesday, 10 September 2019

Revision Skills

Revision Skills

Draw to remember more

REVISION TIPS & TECHNIQUES

Revision Skills by Exam Pal - Creating a Revision Plan

4 Powerful Revision Tips & Techniques For Students For Exams

How to Revise For Exams Effectively

Sunday, 18 August 2019

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

Sunday, 11 August 2019

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

Electric Power

P = IV

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

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

Sunday, 4 August 2019

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