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ECircuits11G(1) - Electrical Circuits An electrical circuit...

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Electrical Circuits An electrical circuit is a pathway through which electrons can flow. We’ll use hydraulic (water flow) analogs to illustrate circuits: player water electrical power source pump battery potential difference pressure drop voltage flow water current resistance turbine resistor (ex: light bulb, any assume zero resistance: in pipes in wires control valve switch 1
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Series and Parallel Circuits Series Circuit 1. There is only one pathway for current to flow. ( Breaking the circuit anywhere stops all current.) 2. The current is the same everywhere. (Charge cannot build up due to electron repulsion.) 3. Resistances in series add up to a higher total (or, ”equivalent” ) resistance. 4. Ohm’s Law applies to the entire circuit : V T = I * R EQ 5. Ohm’s Law also applies across each resistor : Starting from the (+) end of the power source, the voltage drops across each resistor (or ”Load”) by: V L = I * R L 2
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Series and Parallel Circuits ( cont’d ) Parallel Circuit 1. The current divides to flow through different
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