What precautions do you take a minimise the error in finding the unknown resistance of the given wire?

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

What is the principle of a metre bridge ? With a circuit diagram, explain how a metre bridge can be used to determine an unknown resistance of a given wire.

With help of circuit diagram, explain how a meter bridge can be used to find unknown resistance of a given wire.

What do you mean by instrument error?

In a meter bridge when the resistance in the left gap is 2 Omega and an unknown resistance in the right gap the balance point is obtained at 40 cm from the zero end. On shunting the unknown resistance with 2 Omega , find the shift of the balance point on the bridge wire