The IIT JEE main exam will occur in between 3rd to 9th April in 2020. The application for filling the forms will start soon from 7th February till 7th March 2020. The result of the exam every year comes out around 30th April every year.
Physical World and Measurement is one of the most important topic for all the competitive exam such as IIT JEE 2020, NEET 2020 etc.
A large number of students are preparing for the exam to clear it. But while doing the preparation, the student always thinks that the syllabus is vast and time is less.
Chapter-1: Physical World
All the natural Phenomena follow some of the other physical laws and constitute the physical world around human beings. That is why Einstein truly said that “The most incomprehensible thing about the world is that it is comprehensible”.
Physics one of the basic stream of Natural Sciences and its meaning is ‘Nature’. Its Sanskrit meaning is “Bhautiki” which means “Study of Physical World”.
The scope of the physics can be widely seen in two aspects:
Fundamental Forces of Nature:
Law of Conservation:
Chapter-2: Units and Measurements
It is a universally accepted standard to measure any unknown quantity.
The units can be broadly classified into two types:
Derived Formula for Speed:
Speed= Distance /Time
= meter/ second
= [msec-1] basic S.I. Unit
It is the process of assigning a numerical value to the physical parameters of any event or object so that it can be made comparable in physical space.
Different systems of units for Measurement:
Errors in Measurement:
The uncertainty of measuring any object or event through a measuring instrument is termed as an error in measurement. It can be of following types: