2 Kirchhoff’s Laws1. The sum of the voltage sources and voltage drops in a closed circuit must equal zero2. The sum of the currents entering and leaving a point must equal zero
3 Series Circuits This type of circuit only has one path for current The current is the same at any ptThe amount of current needed to push through a resistor is known as voltage dropIn a series circuit, the sum of all the voltages drops must equal the voltage applied
4 Calculating Series Circuit Values 3 rules used w/ Ohm’s law for finding voltage, amps, resistance, and power in series circuits1. The current is the same at any pt in circuit2. The total resistance is the sum of the individual resistors3. The applied voltage is equal to the sum of the voltage drop across all the resistors
5 Parallel CircuitsCircuits that have more than 1 path for the current to flow.Most common type of circuit in homes3 Rules of Parallel Circuits1. The voltage drop across any branch of a parallel circuit is the same as the applied voltage2. The total current flow in the circuit is equal to the sum of the currents through all the branches
6 3. The total resistance is equal to the reciprocal of the sum of the reciprocals of the branch resistancesThe total resistance of a parallel circuit is always less than the resistance of the lowest-value resistor, or branch, in the circuit
7 Combination CircuitsA circuit that contains both series and parallel elementsTo solve the unknown values in a combo circuit use the rules for the series and parallel circuits
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