Explain construction of meter bridge used in laboratory.

Explanation

`rArr` Wire having uniform cross-section and uniform specific resistance (resistivity) and length of 1 mis tied to two end of steel plate as shown in figure. As shown in figure plate are of shape of right angle which consist of connector al their end points. `rArr` Between two end A and C of wire, battery, switch and sometimes rheostat is connected for regulating current.
`rArr` Galvanometer is connected between two terminal at middle of metal plate.
`rArr` Second end of galvanometer connected with jockey key. This can be moved on wire of meter bridge by keeping in contact with the wire.