An AC generator of 220 V having internal resistance `r=10 Omega` and external resistance `R=100 Omega`. What is the power developed in the external circuit?

A cell of e.m.f. 2 V and internal resistance 2Omega and an external resistance 18Omega forms closed circuit. The current through the circuit is

The internal resistance of a cell of emf E is r, and external resistance is R. What is the potential about the external Resistance

The figure shows a source (a battery) with an emf E of 12 V with an internal resistance r of 2Omega and an external resistance of 4Omega is added to complete the circuit. What are the voltmeter and ammeter readings

The figure shows a source (a battery) with an emf E of 12 V with an internal resistance r of 2Omega and an external resistance of 4Omega is added to complete the circuit. What are the voltmeter and ammeter readings

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 battery is of emt E and internal resistance r . The value of external resistance R so that the power across eternal resistance is maximum :

A potentiometer wire of length 10 m and resistance 30 Omega is connected in series with a battery of emf 2.5 V , internal resistance 5 Omega and an external resistance R . If the fall of potential along the potentiometer wire is 50 mu V mm^(-1) , then the value of R is found to be 23 n Omega . What is n ?

A potentiometer wire of length 10 m and resistance 30 Omega is connected in series with a battery of emf 2.5 V , internal resistance 5 Omega and an external resistance R . If the fall of potential along the potentiometer wire is 50 mu V mm^(-1) , then the value of R is found to be 23 n Omega . What is n ?