Current Electri...

In order to pass 10% of main current through a moving coil galvanometer of 99 ohm, the resistance of the required shunt is

The potential gradient along the length of a uniform wire is 10 volt/metre . B and C are the two points at 30 cm and 60 cm point on a meter scale fitted along the wire. The potential difference between B and C will be

Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer.

The tangent galvanometer, when connected in series with a standard resistance can be used as

In Wheatstone\'s bridge P = 9 ohm, Q = 11 ohm, R = 4 ohm and S = 6 ohm. How much resistance must be put in parallel to the resistance S to balance the bridge?

A Daniel cell is balanced on 125 cm length of a potentiometer wire. Now the cell is short-circuited by a resistance 2 ohm and the balance is obtained at 100 cm. The internal resistance of the Daniel cell is

Sensitivity of potentiometer can be increased by

Two resistance R₁ and another R₂of the same material but twice the length and half the thickness are connected in series with a standard battery E of internal resistance r. The balancing point is

Potential gradient is defined as

In an experiment of meter bridge, a null point is obtained at the centre of the bridge wire. When a resistance of 10 ohm is connected in one gap, the value of resistance in other gap is