The brush potential of a separately excited generator, when it is delivering 5 A is 125 V. When the generator dilivers 15 A, the potential difference across the brushes fall to 122 V. What are the induced e.m.f. and the resistance of armature ?

Potential difference between the two brushes of generator is found to be 200 V when current of 5 A is being delivered by it. When current delivered by the same generator is 10 A, then potentail difference between the brushes of generator becomes 180 V. What is the induced emf and resistance of armature coil ?

A generator develops an e.m.f. of 120 V and has a terminal potential difference of 115 V, when the amature current is 25 A. What is the resistance of the armature ?

In the given circuit, the potential difference across the capacitor is 12V . Each resistance is of 3Omega . The cell is ideal. The emf of the cell is

In the circuit shown, the cell is ideal , with emf= 15 V . Ecah resistance is of 3 Omega. the potential difference across the capacitor is

In an electric circuit, potential difference across a lamp is 20 V and current through the lamp is 0.5A. The resistance of the lamp is

If the potential difference between A and D is V, what will be potential difference between F and C. each of the resistance is R.

In the circuit the potential difference across the capacitor is 10 V . Each resistance is of 3Omega The cell is ideal. The emf of the cell is

A cell has an emf 1.5V. When connected across an external resistance of 2Omega , the terminal potential difference falls to 1.0V. The internal resistance of the cell is:

A cell which has an emf 1.5 V is connection series with an external resistance of 10Omega . If the potential difference across the cell is 1.25 V, then the internal resistance of the cell is ("in" Omega)