Current Electri...

A battery has e.m.f. 4 V and internal resistance r. When this battery is connected to an external resistance of 2 ohm, a current of 1 amp. flows in the circuit. How much current will flow if the terminals of the battery are connected directly ?

Two batteries A and B each of e.m.f. 2 V are connected in series to an external resistance R =1 ohm. If the internal resistance of battery A is 1.9 ohm and that of B is 0.9 ohm, what is the potential difference between the terminals of battery A?

When a resistor of 11 Ω is connected in series with an electric cell, the current flowing in it is 0.5 A. Instead, when a resistor of 5 Ω is connected to the same electric cell in series, the current increases by 0.4 A. The internal resistance of the cell is

Consider four circuits shown in the figure below. In which circuit power dissipated is greatest (Neglect the internal resistance of the power supply)

A cell of constant e.m.f. is first connected to a resistance R₁ and then connected to a resistance R₂. If power delivered in both cases is equal, then the internal resistance of the cell is

The n rows each containing m cells in series are joined in parallel. Maximum current is taken from this combination across an external resistance of 3 Ω resistance. If the total number of cells used are 24 and internal resistance of each cell is 0.5 Ω then

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

The maximum power drawn out of the cell from a source is given by (where r is internal resistance)

Find out the value of current through 2 Ω resistance for the given circuit

An energy source will supply a constant current into the load if its internal resistance is