. . . Measurement of Capacitance by Schering Bridge . . Objective : To determine the capacitance of an unknown capacitor.                                                            Fig. 1. Schering Bridge for Capacitance Measurement. The circuit diagram is shown in Fig.1. Let, C1=capacitor whose capacitance is to be measured. r1= a series resistance representing the loss in the capacitor C1. C2= a standard capacitor. R3= a non inductive resistance. C4= a variable capacitor. R4= a variable non inductive resistance.  At balance,   $(r_1+\frac{1}{jwC_1})(\frac{R_4}{jwC_4R_4+1})=\frac{R_3}{jwC_2}.....(1)$  or $r_1R_4-\frac{jR_4}{wC_1}=-\frac{jR_3}{wC_2}+\frac{R_3R_4C_4}{C_2}.....(2)$ Equating the real and imaginary terms in equa. (2), we obtain $r_1= \frac{R_3C_4}{C_2}.....(3)$  and $C_1= \frac{R_4C_2}{R_3}.....(4)$ Two independent balance equations (3) and (4) are obatined if C4 and R4 are chosen as the variable elements. Dissipation factor  $D_1= wC_4R_4.....(5)$.   Cite this Simulator:iitkgp.vlab.co.in,. (2014). Measurement of Capacitance by Schering Bridge. Retrieved 19 December 2017, from iitkgp.vlab.co.in/?sub=39&brch=124&sim=1660&cnt=1 ..... ..... .....