There are few great 'Laws' in our text books. Newtons law, Einsteins theory of relativity, Fleming's Law etc. Most of the students of 2nd PU may know it. The question is that they can answer if anyone make those students to answer even at 12. What's the benefit he/she gets after reading! Believe me. Many of us do not know how to covert Km /hr to m/s . Few are in search of formula. Only thing what we require is Common sense. It is true that farmulas need to be learnt. You should know how the formula is derived as well. You should be able to find out the formula even if you forget it. If so, how should we read? In simple words we must understand Basics . Ohm's law What does it state? In a conductor if u double the potential across it , current also gets doubled. (In a conductor, the current flowing through it is directly proportional to the potential difference across it) You should have a strong grip ...