Question

a null type of bridge with dc excitation is commonly known as

Answer 1

A null type of bridge with dc excitation is commonly known as Wheatstone bridge

Answer 2

A null type of bridge with dc excitation is commonly known as Wheatstone bridge.

Null type instrument is an instrutment in which zero or null indication determines the magnitude of measured quantity. It uses a null detector which indicating the null condition when the measured quantity and the opposite quantity are same.