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?

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

When a battery of e.m.f E and internal resistance r is connected to a resistance R, a current I flows throgh it. Derive a relation between E,I,r and R.

A 24 V battery of internal resistance 4Omega is connected to a variable resistor. AT what value of the current drawn form the battery is the rate of heat produced in the resistor maximum?