Balanced Wheatstone Bridge

Statement I : If the resistance of the first two arms P and Q of a balanced Wheatstone bridge are exchanged , the balanced condition is not disturbed . Statement II : The balanced condition of a Wheatstone bridge is independent of the resistance of the galvanometer used .

When the value of r in the balanced Wheatstone bridge, shown in the figure: is increased from 5 Omega to 7 Omega the value of S has to be increased by 3 Omega in order to maintain the balance. What is the initial value of S ?

Which are coorect statement ? (1) The Wheatstone bridge is most sensitive when all the four resistances are of the same order (2) Kirchhoffs first law (for currents meeting at a junction in an electric circuit) expresses the conservation of charge. (3) The rheostat can be used as a potential divider. (4) In a balanced Wheatstone bridge, interchanging the positions of galvanometer and cell affects the balance of the bridge.

In a balanced Wheatstone's bridge, if the position of the galvanometer and cell is interchanged then the balanced condition will

Apply Kirchoff's laws of current electricity to establish the condition of a balanced Wheatstone's bridge.

Apply Kirchhoff's laws to establish the principle of a balanced Wheatstone's bridge.

A small current flows through the galvanometer in a balanced Wheatstone's bridge. (Write yes or no)

Figure shows a balanced Wheatstone's bridge (1) If P is slightly increased, the current in the galvanometer flow from A to C. (2) If P is slightly increased, the current in the galvanometer flows C to A. (3) If Q is slightly increased, the current in the galvanometer flows from C to A. (4) If Q is slightly increased, the current in the galvanometer flows from A to C.