Current Electri...

In a potentiometer experiment, the galvanometer shows no deflection when a cell is connected across 60 cm of the potentiometer wire. If the cell is shunted by a resistance of 6 Ω, the balance is obtained across 50 cm of the wire. The internal resistance of the cell is

A voltmeter of resistance 1000 Ω gives full scale deflection when a current of 100 mA flows through it. The shunt resistance required across it to enable it to be used as an ammeter reading 1 A at full scale deflection is

A moving coil galvanometer of resistance 100 Ω is used as an ammeter using a resistance 0.1 Ω. The maximum deflection current in the galvanometer is 100 μA. Find the minimum current in the circuit so that the ammeter shows maximum deflection

In the adjoining circuit, the e.m.f. of the cell is 2 volt and the internal resistance is negligible. The resistance of the voltmeter is 80 ohm. The reading of the voltmeter will be

If the resistivity of a potentiometer wire be ρ and area of cross-section be A, then what will be potential gradient along the wire

A voltmeter has resistance of 2000 ohm and it can measure upto 2 V. If we want to increase its range to 10 V, then the required resistance in series will be

With a potentiometer null point were obtained at 140 cm and 180 cm with cells of e.m.f 1.1 V and one unknown X volt. Unknown e.m.f. is

The arrangement as shown in figure is called as

A potentiometer wire of length 1 m and resistance 10 Ω is connected in series with a cell of e.m.f 2 V with internal resistance 1 Ω and a resistance box including a resistance R. If potential difference between the ends of the wire is 1 mV, the value of R is

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