# 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?