Question

1.Draw a graph of Potential difference (V) versus Current (I) for an ohmic resistor. 

2.How can you find the resistance of the resistor from this graph? 

3.What is a non-ohmic resistance?

Answer 1

2. Resistance can be found by finding the reading of V corresponding to I from graph. 

R = V/I 

3. Non-Ohmic Resistance : “The resistors which do not obey the Ohm’s Law are called non-ohmic resistors.”