Category Archives: Competitive Exams

All about Prime numbers

Prime Numbers

A prime number can be divided, without a remainder, only by itself and by 1. For example, 19 can be divided only by 19 and by 1.

Interesting facts about prime
•The only even prime number is 2. All other even numbers can be divided by 2.
•If the sum of a number’s digits is a multiple of 3, that number can be divided by 3.
•No prime number greater than 5 ends in a 5. Any number greater than 5 that ends in a 5 can be divided by 5.
•Zero and 1 are not considered prime numbers.
•Except for 0 and 1, a number is either a prime number or a composite number. A composite number is defined as any number, greater than 1, that is not prime.

Top Engineering Colleges of India list published by Outlook 2014

Outlook has published the Top Engineering Colleges of India list as a result of its “India’s Top Professional Colleges 2014”

IIT topped the chart in the following Order. They were ranked from 1-8

IIT Bombay- IIT Kharagpur- IIT Madras- IIT Kanpur- IIT BHU- BITS Pilani – IIT Guwahati

Study Package for Physics for JEE Main & Advanced

Study Package for Physics for JEE Main and Advanced 2014 is a set of 12 books that are designed to prepare students for the Joint Entrance Examination, carried out by the Indian Institutes of Technology. This package comprises four sections. The Electromagnetism section has four booklets, covering subjects such as magnetic effects of current, electric circuits, direct current and electromagnetic induction. The General Mechanics section has three books, which cover topics such as vectors, circular motion, gravitation and the utilization of Maths in Physics.

Solving physics problems

Lots of time students me how can they solve physics problems and they say that they are having difficulty in solving physics problems. So here I decided to address this issue. Now first of all I would say that do not be afraid of the subject as I say again and again physics to me is most basic of all sciences and you must find the subject interesting and give yourself reasons for studying it for me it was just what I wanted to study till my masters degree and now I like helping students understanding physics.

Brachistochrone Problem

Question
If a particle falls from rest under the influence of gravity from higher to lower point in the minimum time, what is the curve that the particle will follow?
Solution
Suppose v is the speed of the particle along the curve, then in traversing ds portion of the curve time spent would be