Discuss slide wire bridge method for finding resistance?

What is a slide wire bridge? How can you find unknown resistance by it?

Can meter bridge be used for finding the resistance of moderate values high values low values? Explain.

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

Discuss direct method of gene transfer.

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