how is end error eliminated in a carey foster bridge & what is the advantage of it over potentiometer?

Question

Plz explain clearly and in detail

Answer 1

no idea what you said

Answer 2

I haven't heard of carey foster, but the general idea of a bridge circuit is to build a circuit with components of known value and adjust it until it exactly matches the properties of whatever you are testing. A sensitive galvanometer connects the two circuits. If it reads zero, no current is flowing between the circuits, and you are not interfering with the test circuit by drawing current through it. That's what allows a bridge to minimize the measurement error caused by interaction with the test circuit.