Series and Parallel Circuits. Series Circuits Series Circuit: A circuit in which all the current travels through all devices. One pathway. Current through.

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Presentation transcript:

Series and Parallel Circuits

Series Circuits Series Circuit: A circuit in which all the current travels through all devices. One pathway. Current through all devices is the same. Voltage adds up. Equivalence Resistance: The resistance with which all resistors can be thought of as. After equivalence resistance is found, the current flowing through the circuit can be found with the equation V = IR.

Voltage Divider: Series circuits are thought of as voltage dividers. They can produce a voltage of desired magnitude.

Parallel Circuits Parallel Circuits: A circuit where there are several current paths. Circuit that has a junction. Voltage across all devices in parallel is the same. Current adds up. Find the total current in the circuit to the left. Equivalence Resistance of a Parallel Circuit

Applications of Circuits Short Circuit: When you bypass the load, lowering the resistance to almost nothing, which skyrockets the current to almost infinity. Fuse: A circuit protection device that melts if the current is too high. Circuit Breaker: A circuit protection device that opens automatically if the current is big Ground Fault Interrupter: A personal protection device that is built into some outlets that cuts power to the outlet if it senses current is going not to the load. (ie you)

Combination Circuits Combination Circuit: A circuit that has loads in both series and parallel. How to Solve Combination Circuits: 1)Draw a schematic 2)Find any parallel loads. Calculate their equivalent resistance with Draw a new schematic with one resistor with the new value. 3)Find any resistor in series. Calculate their equivalent resistance by adding. Draw a new schematic with a new resistor with that value. 4)Repeat steps 2 and 3 until you are left with ONE resistor. That is the equivalent resistance 5)Use the equation V = IR to find the total current. 6)Remember that if any loads are in parallel, their voltage is the same (the current splits) and if any loads are in series, the current is the same (their voltages add)