Question

Q.1 principle of wheatstone's bridge and condition of balance....!!​

Answer 1

Explanation:

In normal condition, the bridge remains in the unbalanced condition, i.e. the current flow through the galvanometer. When zero current passes through the galvanometer, then the bridge is said to be in balanced condition. This can be done by adjusting the known resistance P, Q and the variable resistance S.

Answer 2

The Wheatstone bridge works on the principle of null deflection, i.e. the ratio of their resistances are equal and no current flows through the circuit.

Under normal conditions, the bridge is in the unbalanced condition where current flows through the galvanometer.

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