Physics 12

Mr. JeanNovember 13th, 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 R1, R2, and R3.

• 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 R1, R2, and R3.

Example #1: • Create a circuit that has a 9V battery with

three resistors R1, R2, and R3.

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.

• 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