Tuesday 24 October 2017

Term 4 Week 1 2017

Faradays Law PhET Application

RCL Phase Relationships

MIT Mathlet on RCL Phase Relationships - Interactive

UNSW Animations for RCL Phase Relationships

Impedance of a Capacitor Resistor Circuit

Z = √(XC2 + R2)

θ = tan-1(-XC/R) = tan-1(-VC/VR)

The Capacitor Reactance is 90° behind the Resistance

The Capacitor Voltage is 90° behind the Resistor Voltage

Impedance of a Inductor Resistor Circuit

Z = √(XL2 + R2)

θ = tan-1(XL/R) = tan-1(VL/VR)

The Inductor Reactance is 90° ahead of the Resistance

The Inductor Voltage is 90° ahead of the Resistor Voltage

Impedance of a RCL Circuit

Z = √((XL - XC)2+ R2)

θ = tan-1((XL - XC)/R) = tan-1((VL - VC)/VR)

Resonance

A.C. Circuits & Resonance

MIT Physics Demo -- Resonant RLC Circuit

Monday 23 October 2017

Term 3 Week 10 2017

Inductance

Inductor PhET Demonstration

Term 3 Week 9 2017

Derived Grade Exam Week
- Revision for the Mock Exams

Term 3 Week 8 2017

Right Hand Screw Rule

Right Hand Slap Rule

Magnetic Flux

Lenz's Law

Faraday;'s Law & Lenz's Law

Wednesday 13 September 2017

Term 3 Week 7 2017

Homework:

Ex 6D, p. 277-280, Capacitors Q = CV & Ep = ½ CV2
Ex 6E, p. 283-284, Capacitors C = 𝜺r𝜺oA/d
Ex 6F, p. 289-292 Capacitor Networks
Ex 6G, p. 289-300 Charging & Discharging a Capacitor

Charging & Discharging A Capacitor

Sunday 3 September 2017

Term 3 Week 6 2017

Homework:

Ex 6D, p. 277-280, Capacitors Q = CV & Ep = ½ CV2
Ex 6E, p. 283-284, Capacitors C = 𝜺r𝜺oA/d
Ex 6F, p. 289-292 Capacitor Networks

Capacitor

Capacitors

Basic Definition

Physical Parameters

Energy Stored

Capacitors & Capacitance

Capacitor Circuits

Capacitors in Series

Calculating Voltage Charge and Total Capacitance

Capacitors in Parallel

Calculating Voltage Charge and Total Capacitance

Capacitors in Parallel vs Capacitors in Series

Capacitors in Combination

Series & Parallel Capacitors

Capacitors in Combination

Patrallel & Series Capacitors

Capacitors in Series

Calculating Voltage Drop

Capacitors in Series

Calculating the Charge Stored

Capacitors in Series

Calculating the Equivalent Capacitance

Capacitors in Parallel

Calculating Voltage Drop

Capacitors in Parallel

Calculating the Charge Stored

Capacitors in Parallel

Calculating the Equivalent Capacitance

Capacitor Dielectric

Dielectrics in Capacitors

Term 3 Week 5 2017

Homework:

Ex 6B, p.200-201, Internal Resistance of a Battery
Ex 6C, p. 205-214, Kirchhoff's Laws

Kirchhoff's Current Law

Kirchhoff's Voltage Law

The sum of voltages around any loop is zero

Kirchhoff's Laws Worked Example

Thursday 24 August 2017

Term 3 Week 4 2017

Homework:

Ex 6A, p.188-196, Electricity Fundamentals
Ex 6B, p.200-201, Internal Resistance of a Battery
Ex 6C, p. 205-214, Kirchhoff's Laws

Electrical Charge

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

Ohm's Law

Internal Resistance of a Battery

Batteries can be thought of as having an ideal voltage supply E.M.F. (Electromotive Force) in series with an internal resistance

V = 𝛆 - Ir

How to find the internal resistance of a

battery

Kichhoff's Laws

Kirchhoff’s Current Law
“At any junction in a circuit, the total current entering the junction equals the total current leaving the junction”
Kirchhoff’s Voltage Law
“Around any closed path of a circuit, the total of all the potential differences, V, is zero”

Kirchhoff's Rules for Circuit Analysis - Explanation