To study the relation between potential difference and current in an electrical circuit, a student is pro vided with a resistance wire, a cell and a key- Let in the above experiment the student obtained the following data.

Draw a graph connecting V and I using above data. Then establish the relation between V and I as a law.

To study the relation between potential difference and current in an electrical circuit, a student is provided with a resistance wire, a cell and a key- Draw a circuit which allows current flow through the resistance wire

To study the relation between potential difference and current in an electrical circuit, a student is provided with a resistance wire, a cell and a key- Instead of the resistance wire if the student uses a p-n junction diode in the forward biased condition how the relation between V and I changes?justify.

To study the relation between potential difference and current in an electrical circuit, a student is provided with a resistance wire, a cell and a key- Modify the circuit by introducing an ammeter, Volt meter and a rheostat for varying the potential dif ference across the resistance and to measure that potential difference and the corresponding current.

A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery used across the potentiometer wire, has an emf of 2V and negligible internal resistance. The potentiometer itself is 4m long. When the resistance 'R_(1)' , connected across the given cell has values of (i) infinity (ii) 9.5Omega , the balancing length on the potentiometer wire are found to be 3m and 2.85m respectively. The value of internal resistance of the cell is

A 12 Omega resistance and an inductance of 0.05/pi H are connected in a series: Across the ends of the circuit is connected a 130 V ac supply of 50 Hz. Calculate (i) The current in the circuit (ii) potential difference between the current and voltage.