Question

In the simplest form, an AC bridge consists of ____________

(a) arms, source and a detector

(b) arms and source

(c) source and detector

(d) arms and detector

The question was asked during a job interview.

My question comes from Introduction to AC Bridges in portion Measurement of Inductance and Capacitance of Electrical Measurements

Answer 1

Right answer is (a) arms, source and a detector

To explain I would say: In its simplest form, an AC bridge consists of four arms, a source for excitation and a null detector. The source is connected across a pair of arms while the detector is connected to the pair of opposite arms.