Memorize Physics Formulas

Published in Hindustan Times, New Delhi, Jan 20, 2016

Most students admit that the thought of writing the hard-to-comprehend physics paper for Class 12 CBSE Board exam makes them nervous. Planning well and clearing all your concepts while revising will add to your confidence during the exam. The next 40 days are critical for students to gear up for the final thrust for the exam that is scheduled for March 5, 2016. Follow these simple yet effective tips and tricks, to crack the exam.

  • Practise from the NCERT book, each and every worked-out example, graph and diagram especially ray diagram for astronomical telescope, compound microscope and reflecting telescope.
  • Certain definitions and laws have to be understood well and memorised. These include Gauss’s Law, Ampere’s circuital law, Lenz’s Law, Self inductance, Mutual inductance, Definition of 1 Henry, Wattless current, Power factor, Quality factor, Brewster’s Law, Malus’ Law, Binding energy and Radioactive Decay law, Laws of photoelectric emission.
  • To evaluate your performance, practise writing at least five full syllabus tests timed exactly like boards and try to complete them in 2 ½ hours instead of three hours.
  • Make a list of all formulae along with what each variable represents.

In order to score well you must avoid the following common errors

  • While defining electric flux or magnetic flux, the angle between surface normal and the field should be considered.
  • In A.C. circuits, instantaneous voltages are added like scalars but peak and RMS voltages are added like vectors.
  • Even convex mirrors may produce real image if the object is virtual.Always show direction of rays, direction of current and label axes.

During the examination, it is advisable to start with the five-mark and three-mark questions which constitute most of the paper and require elaborate and part-wise answers.

  • For the five mark questions write clearly and answer in points (For example – Principle, Diagram, Construction, Working, uses and limitations).
  • For a one-mark question, your answer should be short and crisp, in a word or a line at the most.
  • Though it usually is not a strict rule, you should consider writing four points in two mark questions wherever possible and the most important or inevitable conditions should be presented first.
  • Try to make the presentation without any cutting and overwriting with neat heading and labeling.

The above tips and tricks along with effective time management and relaxation techniques will help you to score more in the Physics examination. Good Luck!

(The article has been prepared by the experts at Studymate and can be reached atstudymate@hindustantimes.com)