Source Conversions

Source Conversions allow us to convert between:

a) Voltage source in series with a resistor and

b) Current source in parallel with a resistor

Which can be used to simplify circuit analysis.

With source conversions we can redraw a circuit to ease analysis, for example if all elements are in series then voltages are easier to determine as we can directly apply the Voltage Divider Rule.

The equation which sets the equivalent voltage source or current source value is simply Ohm's Law where the same value resistor is connected after the transformation:

Example:

1. What is the equivalent current source for the circuit below?


2. Use a source conversion to assist in determining the voltage across R2 in the circuit below:

Questions:

1. a) What is the equivalent current source for the circuit below?

b) What is the current flowing through R1?

Answer

1mA

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