Question

How to minimize the effect of earth capacitance?

(a) by increasing the supply voltage

(b) by using a series resistance

(c) by using a Wagner ground connection

(d) by using an inductor across the circuit

I have been asked this question during an online exam.

Question is from High Voltage Schering Bridge topic in chapter Measurement of Inductance and Capacitance of Electrical Measurements

Answer 1

Right answer is (c) by using a Wagner ground connection

For explanation: In a high voltage Schering bridge, the effect of earth capacitance on the circuit including the galvanometer and the contact leads is minimized by making use of a Wagner ground connection.