Physics II - Lecture 4 (Circuits)

Physics II - Lecture 4 (Circuits) - Physics 1200 Lecture 4...

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P2S11 1 Physics 1200 Lecture 4 Resistive Circuits Concepts: Electromotive force and potential Series and parallel circuits Loop and junction rules RC time constant
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iClicker question 4.01 Consider the circuit on your worksheets and on the demonstration board. P2S11 2 X Y Z 1 6 5 2 3 4 Which switch(es) must be closed in order to supply power only to light bulb X? A) 1 B) 1, 5, 6 C) 1, 2, 3, 5, 6 D) 1, 2, 4, 6 In order for current to flow, a loop must be complete.
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P2S11 3 Electromotive force emf is the "energy per unit electric charge" used to separate two opposite charges. It has the same units as electric potential. (volts) Sources of emf in circuits include batteries, capacitors, generators… pump High (+) reservoir Low (-) reservoir
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P2S11 4 Kirchhoff’s Circuit Rules (the simple statement) 1-VOLTAGE RULE (LOOP RULE): The sum of changes in the potential ( V ) encountered in a complete traversal of any loop of a circuit must be zero. 2-CURRENT RULE (JUNCTION RULE): The sum of all currents into a point in a circuit is equal to the sum of all currents leaving that point.
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P2S11 5 EMF Loop Rule for Circuits The sum of changes in the potential ( V ) encountered in a complete traversal of any loop of a circuit must be zero.
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Physics II - Lecture 4 (Circuits) - Physics 1200 Lecture 4...

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