Physics 12 Mr. Jean November 13 th, 2013

The plan: Video clip of the day Drawing circuits Working with circuit diagrams Basic Ohm’s Law

How to draw circuits: 1)Start at the source of potential energy. 2)Draw the circuit from positive (+) terminal to negative (-). 3)Electron flow (I) travels from negative terminal to the positive; however current from positive to negative. 4)Label component in the order in which they appear dictated by the electric current (I)

How to draw circuits:

Let’s add 2 resistors:

Let’s add a switch and a diode:

Let’s add a capacitor and voltmeter:

Create the following circuits: 1) Create a circuit that has a 9V battery with three resistors R 1, R 2, and R 3. 2) Create a circuit with an AC power supply, a resistor, a lamp, another resistor, a heater, and a switch. 3) Create a circuit with a battery as the power supply, a resistor, a switch, a capacitor, a diode, and another resistor.

Exchange Diagrams Have your neighbour examine your diagram. –Questions to consider. Does the diagram includes all of the necessary pieces? Does the diagram clearly indicate what is going on? Could you use this diagram to create the circuit above given the components in a lab?

Example #1: Create a circuit that has a 9V battery with three resistors R 1, R 2, and R 3.

Example #1: Create a circuit that has a 9V battery with three resistors R 1, R 2, and R 3.

Example #2: Create a circuit with an AC power supply, a resistor, a lamp, another resistor, a heater, and a switch.

Example #2: Create a circuit with an AC power supply, a resistor, a lamp, another resistor, a heater, and a switch.

Return diagram to neighbour: To do: –Respond to the questions to consider 1) Give your neighbour constructive feedback and indication of how they are doing with their diagrams. 2) Think of ways their diagrams can be improved 3) Think of things which you will take from their diagram to improve your future drawings.

Problem: 1) Draw a circuit diagram with 4 lamps, 1 capacitor, an alternating (AC) power supply, with an led dipole controlling electric flow in the clock wise direction. Let’s connect each lamp to a central wire that allows the circuit to flow when the lamp does not function.

Chapter #14 Review: Review work