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.
1. Draw a circuit which allows current ow through the resistance wire.
2. Modify the circuit by introducing an ammeter, Voltmeter and a rheostat for varying the potential difference across the resistance and to measure that potential difference and the corresponding current.
3. Let in the above experiment the student obtained the following data.
| Voltage (V) |
0 |
2 |
4 |
6 |
8 |
10 |
| Current(I)A |
0 |
0.1 |
0.2 |
0.3 |
0.4 |
0.5 |
Draw a graph connecting V and I using above data. Then establish the relation between V and I as a law.
4. 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.
