What is a Wheatstone bridge ?

When is a Wheatstone bridge said to be balanced?

What are the advantages of the null-point method in a Wheatstone bridge ? What additional measurements would be required to calculate R -unknown by any other method ?

State the applications of Wheatstone Bridge? Why?

Name two practical forms of Wheatstone bridge .

Which are conjugate arms in the Wheatstone's bridge? Why?

State use of Wheatstone's bridge along with operational amplifier

Four resistors P, Q, R and S having resistances 3Omega,3Omega,4Omega and 6Omega respectively, are arranged to form a Wheatstone's bridge. The value of the resistance with which S must be shunted in order to balance the bridge is

The measurement of an unknown resistance R is to be carried out using Wheatstone's bridge. Two students perform an experiment in two ways. The first student R_2 = 10 Omega and R_1 = 5 Omega the other student takes R_2 = 1000 Omega and R_1 = 500 Omega . In the standard arm ,both take R_3 = 5 Omega . Both find R = [R_2/R_1] R_3 = 10 Omega within errors

In a balanced Wheatstone's bridge, if the position of the galvanometer and cell is interchanged then the balanced condition will

What is a salt bridge? Write any two functions of salt bridge.