Education

How can I prepare the current electricity chapter of class 12?

Current Electricity is one of the Chapters in the subject of Physics that is included in the class 12 syllabus for the Board Examination. This Chapter can be prepared by the students in a short span of 7 days with constant commitment and dedication in completing it. With daily studying of the topics under this chapter, the students can finish the topic with ease and no stress of last-minute preparation and need not panic.

First of all, the student needs to make a proper schedule as to when he or she should start reading the chapter. An insight of what is inside the chapter needs to be known so that the student can plan to finish the chapter systematically and accordingly with no confusion or repetition of the sub-topics.

The student must go through the chapter once before thoroughly studying the topics in-depth and by heart for scoring excellent marks in their board examination. This chapter is important and needs to be studied so that the students will not miss a chance or opportunity of scoring from this.

The student must select a proper textbook and guide books that can help them in their preparation process. The best and most recommended is the NCERT textbook which has been published according to the Class 12 CBSE Physics syllabus. NCERT textbook is the ultimate key to go about the preparation process. Once the student has done studying the Current Electricity thoroughly from the NCERT textbook and has read it line by line with the proper understanding of the concepts and remember the lines studied, it is more than enough. Yes, the book may seem to contain a lot of things however, make sure you underline, remember the important points, and if possible try remembering them by heart so that it will be easier for one during their examination.

Some of the important topics that need the students to focus and concentration covered in this Chapter are:-

  1. Current density
  2. Drift velocity
  3. Wheatstone bridge- This topic involves derivations, applications, numerical and so on.
  4. Other topics include the difference between emf and voltage etc.
  5. Internal resistance: Here it includes definition and derivations for parallel and series conditions, numerical
  6. Kirchoff’s law
  7. Temperature dependence of resistivity
  8. Potentiometer about it and where it is applied

These are topics that are not that difficult to understand but require concentration and focus during studying. These are some important topics that the students need to understand. It is advisable that the students focus on derivations and definitions from this chapter. There is also a section where the students need to practice graphs and also the students need to know the relationships between different parameters. Knowing the concepts of each topic properly is much required so that the students can attempt questions with ease.

The students after studying the NCERT textbook but also reference books like the Arihant book which can help them attempt a maximum of the questions. Using the NCERT Physics textbook and other reliable reference books can really help the students in finishing the chapter with great understanding.

After this, it is important for the students to revise or read again whatever they have studied as without revision everything that has been studied will be a waste. The students need to focus on difficult topics which are hard to understand and remember. Derivations need to be practiced many a time within the time limit set apart for this chapter.

Relevant Question:When a resistance of 2 ohm is connected across terminals of a cell, the current is 0.5 A. When the resistance is increased to 5 ohm, the current is 0.25 A The e.m.f. of the cell is

For Derivations,  the students are advised to write in their rough or tuition copies or pages and practice them many times till they remember and can easily write them by heart with the proper understanding of the concepts. Electricity derivations are not that difficult but the understanding of them for remembrance is very important.

This chapter also includes numerical that need extra effort for practicing. With the proper understanding of the derivations,the students will getto know how one gets the formulae and they will have no problem in remembering the formulas especially during the solving of problems.

Students in three days can finish the topic, two days of revising, and two days for practicing the problems, NCERT examples, and many other given exercises-. The students need to strictly follow the syllabus so that they will not waste time studying things that are out of the syllabus. Take help from your teachers or tutors beforehand.

The help book suggested to use is also the SL Arora but that depends on which book the students feel comfortable with.Try solvingall available problems by yourself. However, the most important thing is your consistency in studying that can boost up your confidence in knowing the Chapter as a whole. One more thing is to clarify your doubts with a teacher before time.