A Wheatstone's bridge is balanced with a resistance of `625Omega` in the third arm, where `P, Q` and `S` are in the `1^(st), 2^(nd)` and `4^(th)` arm respectively. If `P` and `Q` are intercharged, the resistance in the third arm has to be increased by `51Omega` to secure balance. The unknown resistance in the fourth arm is

What is resistance across P and Q if each resistance is 2 Omega in the given network?

In a balanced wheatstone's network, the resistances in the arms Q and S are interchanged. As result of this:

In a meter-bridge experiment, two resistances P and Q are connected in series in the left gap. When the resistance in the right gap is 50Omega , the balance point is at at the centre of the slide wire. If P and Q are connected in parallel in the left gap, the resistance in the right gap has to be changed to 120Omega so as to obtain the balance point at the same position. find P and Q.

The resistances of the four arms P, Q, R and S in a Wheatstone's bridge are 10Omega, 30Omega, 30Omega and 90Omega , respectively. The emfs and internal resistances of the cell are 7V and 5Omega respectively. If the galvanometer resistance is 50Omega , the current drawn from the cell will be

In Wheatstone bridge, the resistances in four arms are 10Omega,10Omega,10Omega and 20Omega . To make the bridge balance, resistance connected across 20Omega is