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Electronics:

Electronics:. Bridging the gap between 8 th grade studies and High School Presented by: Donna J. Casanova 8 th grade Physical Science Providence Public Schools Nov. 1, 2006. Today’s Lesson: A great truth of circuitry: A little background.

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Electronics:

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  1. Electronics: Bridging the gap between 8th grade studies and High School Presented by: Donna J. Casanova 8th grade Physical Science Providence Public Schools Nov. 1, 2006

  2. Today’s Lesson: A great truth of circuitry: A little background. • One of the 3 great truths: The sum of the voltage drops across the components in a series circuit is equal to the voltage at the source. (Vs = V1+V2+V3…..Vn) • Vocabulary: 1. Voltage drop: A multi-meter measures the amount of voltage that was used to push current through the component. The multi-meter reading is referred to as the voltage drop. 2. Component: From the battery to the solder, a electrical component is any intricate part of circuitry that conducts electricity. 3. Series Circuit: An electrical circuit providing only one pathway for the electricity to flow. 4. Voltage: A measure of electrical potential. It is the “push” that moves electrons through conductors. 5. Current: Electricity moving through a complete circuit. 6. Source: The component from which electrical current flows. In this case the source will be a 9 Volt battery. 7. Voltmeter: measures the amount of voltage on the 2 sides of the component, or the amount used by a component.

  3. Measures an array of things. Voltage is one of them You should turn the multi-meter to the left and set it at 20 V We select 20V because it’s the closest to the 9V battery we are using. Measure the actual voltage at the source. Document voltage Measure voltage drop across each component. Does it add up? The Multi- meter

  4. Inquiring minds want to know... • What is the actual voltage at the source? Is the battery really 9V? • Why do you think you don’t have all 9V’s? • What do you think is wrong if you are getting a negative reading for your voltage drop? • Red is positive, black is negative… • Conventional flow or electron flow? • Do different components take up different amounts of Voltage? • Try them all!

  5. Making the connections to High School! • Biology: • Conservation of Energy. • Organic/inorganic: a. Light to electrical impulses. b. Electrical to light energy. • Chemistry: • Periodic Table, conducting elements. • Valance electrons levels • Chemical equations: one side is equal to the other. • Physics: • Conservation of energy • Ohms law • Potential Voltage

  6. Remember: Your circuit must be closed in order to read the voltage drop. • Use your formula: Vs=V1+V2+V3….VN • How do you think Electronics connects to High School studies?

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