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Electrical Circuits Targeted Skills for Circuits 1.Define: voltage, current, resistance, power, and Ohm's Law. 2. Qualitatively analyze series, parallel and combination circuit problems
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Electrical Circuits Targeted Skills for Circuits 3. Draw schematic diagrams. 4. Construct a circuit and properly wire an ammeter and voltmeter. 5. Solve series, parallel and combination circuit problems.
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Draw orientations that result in the bulb lighting. Draw the inner workings of a light bulb. Introduction Lab – Post Lab
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Conductors and Insulators Definitions: Conducting Path Polarity
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Definitions Conducting Path Polarity
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Types of Connections: Series Connection Parallel Connection
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Schematic Diagram Elements Wire Resistor Bulb
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Schematic Diagram Elements Battery Switch
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Power Polarity Definition Equations:
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Bulb brightness - PreLab
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Bulb brightness – Post Lab
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Qualitative Circuit Analysis
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Example #1 A 60 W light bulb is accidentally left on in the attic when you put Christmas ornaments away. If the bulb is left on until the following Christmas and doesn’t burn out, how much energy does the bulb use in the intervening year? G: P=60 W, T= 1 yr, $= $0.08 per kW hr U: Cost per year = _____ E: P = W/T S: See Overhead If the electric company charges $0.08 per kW hr, how much did you forgetfulness cost your parents?
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Meters Definitions Current Conventional Electron Flow
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Meters Ammeter Voltmeter
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Meters Series Connection Parallel Connection
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Schematic Diagram Elements Ammeter Voltmeter
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Bulbs Reading Lab - PreLab Definitions Power
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Bulbs Reading Lab - PostLab
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Kirchoff’s Laws Loop Law
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Kirchoff’s Laws Junction Law
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Ohm’s Law PreLab Purpose Hypothesis Sketch
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Ohm’s Law PreLab You will have the entire class period to collect and begin your data analysis. The completed lab report is due the next class period. You will be given 20 minutes to write your in-class conclusion at the first of the next class period. You may use your lab report to assist you in your writing as well as the teacher provided copy of the conclusion format sheet (example removed). The lab report and conclusion will be collect after the 20 minute writing period.
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Series and Parallel Lab - PreLab
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Ohm’s Law Post Lab
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Series and Parallel Lab - PostLab
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Equivalent Resistance Series Circuit
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Equivalent Resistance Parallel Circuit
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Equivalent Resistance Compound Circuit
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Example #2 A battery charger is connected to a dead battery and delivers a current of 8.0 A for 3.0 hrs, keeping the voltage across the terminals at 12 in the process. G: P=60 W, T= 1 yr, $= $0.08 per kW hr U: Cost per year = _____ E: V = IR, P = W/T S: See Overhead How much energy is delivered to the battery? What is the internal resistance of the battery?
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Example #3 A circuit is composed of a 24 V battery and four resistors, whose resistances are 110 , 180 , 220 , and 240 . G: V = 24 V U: I series = _____, I PARALLEL = _____ E: V = IR, R series = R 1 + R 2 …, R parallel = 1/ R 1 + 1/ R 2 + … S: See Overhead, S: See Overhead Find the total current supplied by the battery if the resistors are connected in parallel. Find the total current supplied by the battery if the resistors are connected in series.
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Example #4 Complete the VIRP chart for a 2 and a 6 resistor wired in series with a 12 V battery. VoltageCurrentResistancePower 1 2 Total
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Example #4 For the 2 and a 6 resistor wired in series with a 12 V battery. Draw the schematic diagram
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Example #5 Complete the VIRP chart for a 2 and a 6 resistor wired in parallel with a 12 V battery. VoltageCurrentResistancePower 1 2 Total VoltageCurrentResistancePower 1 2 Total
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Example #5 For the 2 and a 6 resistor wired in series with a 12 V battery. Draw the schematic diagram
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Example #6 Complete the VIRP chart for for the circuit shown to the right. Let V = 16 V, R 1 = 4 , R 2 = R 3 = 8 VoltageCurrentResistancePower 1 2 Total
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