Draw the experimental set-up to verify `V//I` is constant for a conductor.

Explanation

Aim : To verify Ohm's law or to show that `(V)/(I)`= constant for a conductor.
Materials required : 6V Battery eliminator, 0 to 1A Ammeter, 0-6V volt meter, copper wires, 50 cm manganin coil, Rheostant, switch and 3V LED, etc.
Procedure :
1) Complete the circuit as shown in figure. Knob should be adjusted to 4.5V at battery eliminator.
2) Using Rheostat change the potential difference between two ends of manganin wire from 0V to 4.5V (maximum).

3) By using Rheostant adjust the protential difference IV between two ends of manganin wire.
4) Now observe the electric current through Ammeter in the circuit and note down in the following table.

5) Using Rheostant change the potential difference values upto 4.5V and note down the current value (I) in the table.
6) Take atleast five values of V and I and note down in the table.
7) Find `(V)/(I)` for each set of values.
8) We notice that `(V)/(I)` is a constant.
`V alpha I implies (V)/(I)` = constant.
This constant is known as resistance of the conductor, denoted by R.