Question

Balance equation for computing the value of the unknown inductance is?

(a) Lx = R2 R3

(b) Lx = R2 C1

(c) Lx = R2 R3 C1

(d) Lx = R3 C1

I got this question in an interview for internship.

My question comes from Maxwell’s Inductance Capacitance Bridge topic in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer 1

Right answer is (c) Lx = R2 R3 C1

Explanation: The balance equation for determining the value of the unknown inductance is given by the relation Lx= R2 R3 C1.

where,

C1 is the capacitance across the resistance R1

R3 is a variable resistance and R2 is a fixed resistance.