Dc Circuits | Understand Internal Resistance

What do you understand by internal resistance and terminal potential difference of a cell? On what factors do they depend?

DC Circuits questions

In a closed circuit, the e.m.f. and internal resistance of the generator are E and r respectively. If the external resistance in the circuit is R, then Ohm's law has the form

In a circuit a cell with internal resistance r is connected to an external resistance R. The condition for the maximum current that drawn from the cell is

A battery of unknown emf and internal resistance is given to a student for the experiment. When student connects the battery to an external resistance of 10 Omega then 1A current flows through the circuit and when the same is connected to 15 Omega resistance then 0.75 A current flows through the circuit . Calculate the emf and internal resistance of the given battery.

A few straings cells in series are to be charge from a 30V d.c. supply The end of each cutt is 1.35V and internal resistance is 0.1 Omega The charging current is 3.0A in this arrangement how many calls can be charge and what extra resistance is required be the connected in the circuit ?

Find power in entire circuit where internal resistance is 0.6 ohm.

Find the current flowing current flowing thorugh the resistance R in the circuit shown in Fig. The internal resistances of the batteries are negilble.

The current in a circuit containing a battery connected to 2Omega resistance is 0.9A. When a resistance of 7Omega connected to the same battery, the current observed in the circuit is 0.3 A. Then the internal resistance of te battery is