Discuss a practical form of a Wheatstone's Bridge to find an unknown resistance.

What is the principle of Wheatstone bridge for determining an unknown resistance ? How is it realised in actual practice in the laboratory?

Explain the principle of Wheatstone bridge for determining and unknown resistance. How is it realised in actual practice in the laboratory?

Three resistance P, Q, R each of 2 Omega and an unknown resistance S from the four amrs of a Wheatstone's bridge circuit. When a resistance of 6 Omega is connected in parallel to S the bridge gets balanced. What is the value of S ?

Draw a cricuit diagram of a metre bridge arranged to find the value of an unknown resistance. Write the formula used.

Name two practical applications of Wheatstone bridge?

With the help of a circuit diagram, explain how a metre bridge is used to find the unknown resistance of a given wire.