Two poles of a cell of em.f 1.5 V are connected to the ends of a `10Omega` coil. If current in the circuit in the cirucit is 0.1 A, calculate the interal resistance of the coil.

A battery of e.m.f. 12 V and internal resistance 5Omega is connected to a resistor. If the current through the circuit is 0.3 A, what is the resistance of the resistor? What is the terminal voltage of the battery, when the circuit is closed?

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

A cell of emf 2 V and internal resistance 0.1Ohm is connected to a 20 Ohm resistor .What is the current in the circuit ?

A battery of e.m.f. 10V and internal resistance 3 Omega is connected to a resistor. If the current in the circuit is 0.5 A, What is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?

A battery of emf 10 V and internal resistance 3 Omega is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?

When a resistor of 20 Omega is connected in series with a battery, the current is 0.5 A. when a resistor of 10 Omega is connected the current becomes 0.8 A. calculate the emf and the internal resistance of the battery.

An e.m.f 0.5 V is developed in the secondary coil, when current in the primary coil changes from 5.0 A to 2.0 A in 300 millisecond. Calculate the mutual inductance of the two coils.

Two cells of emfs 1.5 V and 2.0V internall resistance 1 Omega and 2 Omega are connected in parallel so as to send current in the same direction through an external resistance of 5 Omega . Using Kirchhoff's rules, calculate. potential difference across the 5 Omega resistance.