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Strike while the iron is hot !

Dear students,

CBSE has given you more time for exams. We have approximately 7 days before the Physics exams. How to use this seven days effectively for a thorough revision is very important.

7-8 days of sleeping is a must.

One hour of exercise

1 to 2 hours for break fast lunch and dinner

1 hour for daily routine

SO you can have upto 12 hours for dedicated studying.

PLAN WELL

“No one plans to fail, but fails to plan”

Since the seven days are for revision and not for first hand study, I am suggesting a DIVIDE AND LEARN policy

We have tom complete one round of revision in five days and the time left can be utilised for the second round or the final revision.

You might have already noted the important topics as per the syllabus already announced by CBSE and as guided by your teachers. If you have not done so far, I am posting it in the next article.

We divide the Physics curriculum into three

  • Electricity and Magnetism (Electrostatics, Current electricity, magnetic effects of current, electromagnetic induction, Alternating current)
  • Optics (Electromagnetic waves, Ray optics, Wave optics, Optical instruments)
  • Modern Physics (Dual nature of matter and radiation, Atoms, Nuclei, Electronics)

Each chapter is to be divided into 1 mark, 2 marks, 3 marks, 4 marks and 5 marks questions.

Learn answers to all the 3 marks and five marks of the three sections in first three days. Divide the answers to questions as well known, difficult and very difficult. Add hints to remember, mnemonics etc along with the answers you prepared, Don’t forget to show the answers prepared by you to your teachers and get it corrected. Discuss the difficult and very difficult portions identified by you with your teacher. He/She may have an easy way to learn it.

Learn the answers to questions with 1 mark and 2 marks of the complete curriculum on the 4 th and fifth day.

The last two days to be used to revise well you what you know and revise the difficult ones. The very difficult ones to be taken up only if you are able to learn without much load to the brain.

Revise all the easy and average questions once again on the night before your exam day without worrying much about the extremely difficult ones.

Go to bed early and ensure that you get minimum 6 hours sleep.

Wake up early and keep cool. Go to exam with a confident mind.

Keep visiting the site.

I will be adding more tips and will be doing the work I suggested as above for your benefit. You can add more questions as comments to the post.

Please feel free to ask your questions in the “Ask a Question” session.

Dreams come true only for those who do their part

I was recently narrating the life story of a girl from Dindigul who got married to a police constable at the age of 14. She was not even reached class 10. She became the mother of two kids by the age of 18. During that time she had to accompany her husband to a police parade. She was in the gallery watching the parade. AFter the parade, she was very much impressed. She asked her husband, “Who are those people whom you saluted?”The constable replied, “They are our senior Officers. They are IPS Officers”She said, “I also want IPS. I want to get this salute”Tell me, is this realistic or not? Was it within her reach or not?She went on telling, everyday, “I want that salute, the ceremonial one, in front of lakhs of people, I want IPS”Her husband tried to explain, “You have not even passed matriculation!””I will do anything, but i want that”Understanding the seriousness and the depth of her wishes and dreams, she was allowed to study privately for class 10 which she passed with good marks, then PUC and then degree too.The dreams and the strong determination guidend her.The it was time to prepare for the Civil Services. She was arranged accommodation as paying guest in Chennai. She started attending coaching classes and prepared well. When the time came, she wrote the exam but could not clear the prelims. She tried for the second time, she could not clear .She attempted again for the third time, She could not clear the prelims.Now the family and her husband told, you come back. There is no problem. We can do something else.She said, Give me one more chance. I want to attempt once more.And this was the turning point. She appeared for the fourth time. SHe cleared Prelims. Then the mains and performed well in the interview.And she is now DCP of Mumbai Zone 4N Ambika IPS.

I cite this as the best example of how our determination, our dreams and the incessant efforts to achieve it lead to the fulfilment of our dreams. Just the sight of a ceremonial salute and the strong wish to get it for herself changed everything. This is the type of conspiracy that the universe makes when someone has powerful dreams and becomes ready to put in all effort.

“DID THOSE PHILOSOPHERS WORK IN VAIN”

“The Philosophers who worked in search of the Philosophers’ stone and those set themselves dedicated to find the elixir of life”The works of those in search of the Philosopher’s stone didn’t go in vain, They made the beginning. The beginning itself was so wonderful that anyone who got touched by the idea got fascinated and this lead to a group of philosophers setting aside everything and did series of experiments. Though THEY were not successful if finding out a way or means to turn anything to gold, it helped the evolvement and enrichment of the Natural Philosophy. The Alchemists and the work which followed for years helped the development of the present day science, which is better than GOLD. The efforts also resulted in the discovery of many more precious metals other than Gold.

Image may contain: food

Which supports my theory “If you are not getting the one you are dreaming for, Better ones are awaiting you” The advancement in Science and Technology which capacitated the then philosophers the present scientists to work wonders, all started from the quest for the mysterious substance which could turn anything to Gold. I would like to say this was not a reverie, but it was a challenging and motivational beginning; unless for the sparkling of the GOLD involved in it, the alchemists wouldn’t have so many followers.Similar is the research on Elixir of life. Extensive research is going on REGENERATIVE REPROGRAMMING. We “grow old” and approach death mainly because of the system stops producing new cells. Now In Vivo reprogramming is under research and implementation on animals to increase the lifespan and combat the irreversibility of ageing.Though both the streams started with an apparently impossible concept, but what they resulted were worth more than what they actually wanted.To add, the amount of quality literature that resulted from the concept; aren’t they priceless? How well it is catching the attention and imagination of children and adult alike in Harry Porter etc(Let the discussions go on. Reflections and reactions welcomed)

Quarks, conservation, entanglement

Doubt from AskPhysics.com
I have heard the following statements->
1. Quarks always exist in a group of 2 or 3, and can not stand alone.

2. Protons are made up of 2 up quarks, and 1 down quark.

3. Quantum mechanics allows us to entangle a particle by somehow dividing it into 2(For example, if a proton’s energy is 5 joules, if we split into 2 then sum of both splitted particles will have energy sum of 5 joules.)

Aren’t the statements contradicting each other? Please tell me correct if anyone of my statement is incorrect. Thank You!

Answers invited from all

Prepare for Physics oral test too during lockdown

Plus Two Physics Oral Test series Many schools have started oral questioning also as part of diagnostic and formative assessment. The initiative was …

Prepare for Physics oral test too during lockdown

Theory of Relativity

The basic concepts of relativity are explained in a very simplified way that are easy to understood by Mr. Vivek Sawhney in this YouTube Video… The video focuses upon the general discussion on Theory of Relativity….What is the theory of Relativity? What is time dilation and length contraction?

Theory of Relativity explained

SUBSCRIBE to the YouTube channel…..

What is the theory of Relativity and where it’s concepts can be applied?

(more…)

A numerical problem from motion in 1 Dimension

A boy plays with a ball on a field surrounded by a fence which has a height of 2.5m . He kicks the ball vertically up from a height of 0.4m with a speed of 14 ms−1. (a) What is the maximum height of the ball above the fence? (b) What is the time taken to reach the maximum height? (c) How long is the ball above the height of the fence? (d) What is the velocity of the falling ball at the height of the fence? (e) What the acceleration of the ball after 1s ?

Asked John

Answer:

(a)

u=14 m/s

v=0 m/s at max height

(more…)

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