Term 3 Week 5 2018

Homework

Ex 6A, p.251-254 Level 2 D.C. Circuit Revision

Ex 6B, p.261-261 Internal Resistance of a Battery

Ex 6C, p.267-272 Kirchhoff's Laws

Ex 6D, p.277-280 Capacitors Ep = ½ QV

Ex 6E, p.283-284 Capacitors C = 𝜺r𝜺oA/d

Capacitor

C = Q/V

Capacitors

Basic Definition

Physical Parameters

Energy Stored

Ep = ½ QV

Capacitors & Capacitance

Dielectric

An insulating material placed in between the capacitor plates to increase the Capacitance

C = 𝜺r𝜺oA/d

Dielectrics in Capacitors

PhET Capacitor Lab Basics - App

Term 3 Week 4 2018

Homework

Ex 6A, p.251-254 Level 2 D.C. Circuit Revision

Ex 6B, p.261-261 Internal Resistance of a Battery

Ex 6C, p.267-272 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

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

V = ΔE/Q

Ohm's Law & Resistance

Power

Circuit Symbols

Ohm's Law

Ohm's Law - PhET App

D.C. Circuit Construction Kit - PhET App

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

Kirchhoff's Rules for Circuit Analysis - Example 1

Kirchhoff's Rules for Circuit Analysis - Example 2

Kirchhoff's Rules for Circuit Analysis - Example 3

Term 3 Week 3 2018

Homework

Ex 3D, p.75-79, Standing Waves and Music

Ex 3E, p.81-84, Beats

Ex 3F, p. 87-96 Doppler Effect

Ex 3B, p. 57-62, Two Point Source Interference (Double Slit Experiment)

Beats

two waves of a similar frequency (similar wavelength) superimpose to come in and out of phase causing constructive and deconstructive interference respectively. This causes a warbling/beat sound of frequency (fb) equal to the difference in respective frequencies

fb = | f1 - f2 |

Wave Beats

Easy Beats- Physics

Doppler Effect

The Doppler Effect: what does motion do to waves?

Doppler Effect

Intro to the Doppler Effect

Doppler Effect Observed Frequency Equation

Sonic Boom

Two Point Source Interference

• Antinodes - Path Difference = n𝜆
• Nodes - Path Difference = (n + 1/2)𝜆

Two Point Source Interference

n𝜆 = dsin(𝛳)

n: Antinodal Fringe Number

𝜆: Wavelength (m)

d: Slit-Spacing (m)

𝛳: Angle between Fringe on screen from the central position line

Iff 𝛳 is very small, then

n𝜆 = dx/L

x: Distance from Fringe on screen to central position (m)

L: Distance from slits to screen along the central position line (m)

Wave-Particle Duality Applied to the Double Slit Experiment