Current Electri...

A primary cell has an e.m.f. of 1.5 volt, when short-circuited it gives a current of 3 ampere. The internal resistance of the cell is

A new flashlight cell of e.m.f. 1.5 volt gives a current of 15 amp, when connected directly to an ammeter of resistance 0.04 Ω. The internal resistance of cell is

Calculate the value of E, for given circuit, when value of 2 amp current is either flowing in clockwise or anticlockwise direction

Three identical resistances A, B and C are connected as shown in fig.
The heat produced will be maximum

To get the maximum current from a parallel combination of n identical cells each of internal resistance r and external resistance R, when

The internal resistances of two cells shown are 0.1 Ω and 0.3 Ω. If R = 0.2 Ω, the potential difference across the cell

A torch battery consists of two cells of 1.45 volt and an internal resistance 0.15 Ω. If each cell sends current through the filament of the lamps having resistance 1.5 ohm, the value of current will be

The electromotive force of a primary cell is 2 volt. When it is short-circuited it gives a current of 4 ampere. Its internal resistance in ohm is

The figure shows a network of currents. The magnitude of currents is shown here. The current i will be

A battery of e.m.f. E and internal resistance r is connected to a variable resistor R as shown here. Which one of the following is true?