Consider the following modified Wheatstone bridge. Assume that V and R are known; Rx = R + AR, where AR is an unknown value AR << 1 R ● ● AR Show that Vout R V 4R V R www R + V3 Vout + Vx www R R, R+AR

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Norton Theorem

In the current circuit law, the Norton theorem (also known as the Mayer-Norton theorem) is a simplification that can be applied to networks generated by a constant line of opposition, power sources, and current assets. In two network terminals, it can be switched on with a current supply and single resistor respectively.