The current in a circuit with an external resistance of `3.75Omega is 2.5A`. When a resistance of `Omega` is introduced into the circuit, the current becomes `0.4 A`. The emf of the power source is

The current in a circuit with an external resistance of 3.75Omega is 2.5A . When a resistance of 1 Omega is introduced into the circuit, the current becomes 0.4 A . The emf of the power source is

The current in a circuit with a cell of e.m.f 6 V and internal resistance 0.1 Omega is 2 A. Find the value of the external resistance in it.

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

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

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

In the electric circuit shown each cell has an emf of 2 V and internal resistance of 1Omega . The external resistance is 2Omega . The value of the current is (in A)

A cell of emf epsilon and internal resistance r gives a current of 0.5 A with an external resistance of 12 Omega and a current of 0.25 A with an external resistance of 25 Omega . Calculate (a) internal resistance of the cell and (b) emf of the cell.

In the circuit shown, the current in 3Omega resistance is