Which statement is TRUE regarding Norton

Solution

Norton’s theorem states that any complex linear two-terminal network can be simplified into an equivalent circuit consisting of a current source (Norton current) in parallel with a resistance (Norton resistance) . The Norton current is the short-circuit current seen at the load terminals, and the Norton resistance is the equivalent resistance of the network with all independent sources turned off. This theorem is very useful in analyzing circuits because it allows replacing a large portion of the network with a simple current source–resistor combination. It is also the dual of Thevenin’s theorem, which uses a voltage source in series with resistance.