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Complex Resistor Combinations. Chapter 20.3. Resistors Combined in Both Parallel and Series. Most circuits today employ both series and parallel resistor wiring to utilize the advantages of each type.
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Complex Resistor Combinations Chapter 20.3
Resistors Combined in Both Parallel and Series • Most circuits today employ both series and parallel resistor wiring to utilize the advantages of each type. • Wiring in parallel allows devices to run independently of the others and allows the potential difference to be the same in each device. • Wiring in series can be used to control the amount of current flowing through a circuit, which can prevent excessive current reaching the device
Solving Complex Circuits • When determining the equivalent resistance for a complex circuit you must: • Simplify the circuit into groups of series and parallel resistors. • Find the equivalent resistance for each group or resistors. • Find the total equivalent resistance for the whole circuit.
Complex Resistors Circuit • Schematic diagrams for an arrangement of various electric devices. The equivalent resistance of the circuit is 10 ohms.
Working Backwards • Work backwards to find the current in and potential difference across a part of a circuit. • This can be done by using Ohm’s Law and the chart below:
Example Problem Find the potential difference and current through each of the resistors in the diagram below. 40 V 15 Ω 4Ω