Abstract: The phasor method is one of the important ways to analyse sinusoidal AC circuit.The features of the method are simple,intuitive,and easy operable.With inductance-bridge and capacitance-bridge,the advantage of the phasor method in AC bridge balance analysis is described.The phasor method is used to AC bridge experiment,which will not only help students to consolidate the concept of phase volume,but also a deep understanding of the measurement principle of AC bridge.

Key words: electric bridge, phasor method, capacitor, inductor, phasor diagram