10.2: Electricity and Electric Circuits. Static vs. Current Electricity Static Electricity: charges build up in one location Current Electricity: electrons

Download 10.2: Electricity and Electric Circuits. Static vs. Current Electricity Static Electricity: charges build up in one location Current Electricity: electrons

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<ul><li> Slide 1 </li> <li> 10.2: Electricity and Electric Circuits </li> <li> Slide 2 </li> <li> Static vs. Current Electricity Static Electricity: charges build up in one location Current Electricity: electrons on the move </li> <li> Slide 3 </li> <li> Current Electricity to operate electrical devices, you need a steady flow of electrons. Current electricity is the continuous flow of electrons in a circuit. The electrons flow continuously if the following conditions are met: 1.there is a continual supply of energy 2.the electrons have a a complete path to flow through (electric circuit) </li> <li> Slide 4 </li> <li> Electric Circuits An electric circuit must include: 1.An energy source energizes the electrons, ex. battery, photoelectric cell in calculator 2.a conducting wire (connector) provides a path for current to flow 3.A load which is a device that converts electrical energy to another form of energy, ex. light bulb Many electric circuits also include a switch that turns the circuit on or off by closing or opening the circuit. </li> <li> Slide 5 </li> <li> Examples of Loads Converts electricity to light bulblight energy fanmechanical energy doorbellsound energy </li> <li> Slide 6 </li> <li> Schematic Circuit Diagrams engineers and designers of electrical circuits use special symbols that show the components and connections in a circuit. a drawing made with these symbols is called a circuit diagram. </li> <li> Slide 7 </li> <li> Schematic Circuit Diagrams Follow these rules when you draw circuit diagrams. 1. Always use a ruler to draw straight lines for the conducting wires. 2. Make right-angle corners so that your finished diagram is a rectangle. </li> <li> Slide 8 </li> <li> Circuit Symbols Conductor or wire allows current to flow very easily from one part of a circuit to another. </li> <li> Slide 9 </li> <li> Circuit Symbols Cell - supplies electrical energy -the positive end is bigger than the negative end. </li> <li> Slide 10 </li> <li> Circuit Symbols 2 Cells Note: every time a cell is added you need to draw another cell; a battery is a combination of two or more cells </li> <li> Slide 11 </li> <li> Circuit Symbols Ground a connection to earth </li> <li> Slide 12 </li> <li> Circuit Symbols Switch - an on-off switch allows current to flow only when it is in the closed (on) position </li> <li> Slide 13 </li> <li> Circuit Symbols Lamp a load which converts electrical energy to light </li> <li> Slide 14 </li> <li> Circuit Symbols Resistor A resistor restricts the flow of current </li> <li> Slide 15 </li> <li> Circuit Symbols Ammeter device that measures current A </li> <li> Slide 16 </li> <li> Circuit Symbols Voltmeter device that measures voltage V </li> <li> Slide 17 </li> <li> Circuit Symbols Motor -electrical load that converts electrical energy into movement M </li> <li> Slide 18 </li> <li> Circuit Building Draw the circuit diagrams for each circuit described on the handout Now try building the circuit (substitute the buzzers for the motors) </li> </ul>

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