some basic definitions

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Quantity Unit Symbol Length metre m mass kilogram kg Time second S Temperature kelvin K Amount of Substance mole mol Electric current ampere A Luminous intensity candela Cd ..

Point : It is an exact location. It is a fine dot which has neither length nor breadth nor thickness but has position i.e., it has no magnitud..

Physical Quantity Name of the Unit Symbol Length meter m Mass kilogram kg Time second s Temperature kelvin K Electric current ampere A Luminous intensity candela cd Amount of substance mole mol Usually all small measurements are expressed by usin..

If a system consists of two point charges q 1 and q 2 , then the total charge of the system is got by adding q 1 and q 2 . Thus, the charge add up like real numbers (scalars). When we add charges, one should take care of its sig..

As wavelength is the distance covered during one oscillation and frequency is the number of oscillations per second, the product of the wavelength and frequency would give us the wave velocit..

Introduction - A dynamic environment of matter and material surrounds man. Since his birth he has been exposed to these changing surroundings. His curiosity to understand his surroundings and the events occurring around him, has led him to systematically enquire and collect information through expe..

Fundamental concepts of Geometr..

Gravitational force - It is the force of attraction between any two bodies in the universe. The gravitational force is inversely proportional to the square of the distance between the two bodies and directly proportional to the product of the masses of two bodies. Gravitational force is small when ..