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Class 12 Physics tips for board exam and JEE: How to study capacitors

physics and Maths can be two of the most difficult subjects for many students like you when preparing for class 12 exams. When you are preparing for your boards or competitive exams, the vastness of the portion for class 12 Physics can be very intimidating.

However, don’t get intimidated or nervous. Pick up one chapter at a time and study it well.

Capacitors have been given importance in your class 12 Physics board exam and in JEE Main 2018.

Here are a few tips to study capacitors:

1. Get your basics right

To understand the concepts well, ensure that you have thoroughly studied Electrostatics of a conductor.

This will help you form the building blocks to understand various concepts and laws. It will also help you solve numericals more easily.

2. Understand the concepts and sub-topics

Now that you know your basics, start by reading and understanding the topic. Don’t try to rote learn since this will not help you in the long run.

Lay more emphasis on understanding the Capacitance Formula and using it in numericals.

You should have a clear understanding of diagrams of Parallel Plate Capacitors, Cylindrical Capacitors and Spherical Capacitors. Don’t forget to study the charge distribution on these plates!

Make flashcards and notes on topics that have seen a lot of importance by exam setters in the past. These include applications of Kirchhoff’s law in circuits involving capacitors, Equivalent Capacitance in Series-Parallel, and Dielectrics in Capacitors.

3. Practice the numericals

Once you have understood all concepts, it is time to practice numericals!

Go through the sample questions in your textbook and try solving them on your own. If you are using an eLearning app, solve the practice questions.

Once you have solved them, mark the ones where you went wrong. If you made an error because you did not understand the concept well, go back to studying it thoroughly.

Understand the important types of numericals and solve multiple problems of each type.

Give special attention to:

  • Finding capacitance by varying the dimensions of capacitors
  • Finding equivalent capacitance in series-parallel
  • Finding the capacitance of a parallel plate capacitor with a dielectric slab between plates
  • Capacitor circuits
  • Energy in capacitors
  • Charging and discharging of capacitors

4. Get your doubts solved

While studying the concepts or while solving numericals, if you have any doubt, don’t wait until the end of the year to ask your teacher. You should get them solved instantly.

Addressing your doubts the minute you are confused will help you learn faster.

The best way of doing this is using an eLearning app that solves your doubts on chat instantly, at any time of the day or night.

All you have to do is click a picture of your doubt and upload it. An expert will chat with you to explain your doubt and answer any other questions you may have.

We hope that these tips make it easier to study Capacitors! We will be back next week with more tips on topics in Chemistry.

- Tips provided by Rajshekhar Ratrey, VP, Educational content, Toppr

Read: CBSE Class 12 Physics Board Exam: 10 common mistakes students make pointed out by Board examiner