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Norton’s theorem is a technique used to simplify a complex electrical network into an equivalent circuit consisting of a single current source and a parallel resistor. It is a useful tool for analyzing and designing electrical circuits.
In DC circuits, Norton’s theorem states that any complex circuit consisting of a number of voltage sources and resistors can be replaced by a single current source and a parallel resistor. The equivalent circuit is known as the Norton equivalent circuit.
To find the Norton equivalent circuit, follow these steps:
Remove all the loads or devices connected to the circuit.
Calculate the short-circuit current that would flow through the two points where the load was connected.
Calculate the equivalent resistance between the two points where the load was connected.
Draw the Norton equivalent circuit by placing a current source of magnitude equal to the short-circuit current and a resistor of value equal to the equivalent resistance in parallel.
The Norton equivalent circuit is useful in analyzing and designing electrical circuits because it simplifies the circuit and allows for easier calculations of current and voltage values.
