State Laws Of Resistance

State the laws of resistance.

Answers:

Laws of resistance :  

1. Resistance of a conductor is directly proportional to its length R α 1  

2. Resistance of a conductor is Inversely proportional to its area of cross-section R α 1/a  

3. Resistance of a conductor depend upon its nature i.e. copper has less resistance than iron. 

 4. Resistance of a conductor increases with increase in temperature i.e. resistance of filament of a bulb is more when lighted as compared to when it is not lighted.