Electrical Engineering ⇒ Topic : Andersons Bridge

Anderson's Bridge

Figure (a) shows the schematic diagram of Anderson's bridge. It is a modification of the Maxwell's Inductance-Capacitance Bridge.

                      FIGURE (A)

Let L₁ is self-inductance to be measured, R₁ is resistance of L₁, r₁ is resistance connected with L₁, r₁, r, R₂, R₃, and R₄ are non-inductive resistances, and C₄ is fixed standard capacitor.

At balance, I₁ = I₃        ........... (1)

and I₂ = I_C + I₄          ............  (2)

                ............ (3)

               .............. (4)

                                          .................. (5)

Substituting the value of l_C from Eq. (5) to Eq. (3), we get

                   ........... (6)

Similarly, using Eq. (5), we get from Eq. (4)

               .............. (7)

From Eqs. (6) and (7), we get

              .............. (8)