how to study this chapter …................................................................................................................................

which chapter ?

You should go through your notes and revise them but remember more you practice you will be more confident and yes learn only one rule to find out direction so that you can easily recall it

Dear student ...Physics is very unified , you have to correlate it .There are certain chapters in physics which can be easily interconnected , for example the formulas of potential , fields , forces etc are same in magnetism, electrostatics , gravitation.You just need to make necessary changes like in gravitation we use mass , in electrostatic we use charge and in magnetism we use magnetic pole but the basic formula is same ....and also try to visualize physics and should learn how to find direction...With Regards ...Mahima..(Askiitians Forum Expert)