What to focus to get a better score and rank...??

From the previous post on electricity,  you came to know the important concepts on capacitors and electrostatics. Now, it’s time to know more about the remaining concepts left behind. Electromagnetism forms a very huge portion of IIT-JEE physics. If practiced carefully , it definitely helps you score well despite it is a time consuming chapter.  You may find it boring in the beginning,  but it is in fact an easy chapter…!!

Current Electricity :

This is one of the easiest chapters and takes very less time to finish off. The basic concepts involved in this chapter are Ohm’s law and Kirchoff’s law. As it has equalently good weightage in IIT-JEE exam, solving many problems from this helps  a lot. While solving problems from this chapter, it is more useful when the mechanical analogy is kept in mind especially in RC circuits. In some cases, the RC circuits can be solved quickly, less than a minute if you are able to know the mechanical analogy suited. “Heating effect in electric current” is also an important concept.  When this concept is combined with thermodynamics, some good questions can be formed.

Magnetism :

Magnetism involves many applications from ‘Mechanics’ which is learnt in 11^th standard. Many good questions can be formed on the concepts involving electric as well as magnetic  field.  The basic concepts in mechanics like kinematics, work energy theorem, law of conservation of linear momentum etc should be well versed. In most of the cases questions are asked from calculation of magnetic field in various cases.  Another important concept is the magnetic moment, on which many questions can be asked.  It is advised to practice many questions which involve the calculation of magnetic moment , basic idea of magnetic materials, explanation using magnetic moment etc. One more important topic is a loop in a uniform magnetic field which has many questions from this. From moving coil galvanometer also many good questions can be formed.

So guys..!! Focus on which helps you to score more and practice a lot on these areas to avoid mistakes and to get a better rank.