physical propertya physical quantity is a physical property to which we can assign both a numerical value and a .

The value of a physical quantity can be obtained in some other system, when its value in one system is given using the method of dimensional analysis. Measure of a physical quantity is given by X = nu, u - size of unit, n - numericalh..

Introduction - Systems of Units - A unit of a quantity is the standard quantity used to measure a physical quantity. The process of measuring a physical quantity has two steps: Selection of unit To find the number of times that unit is con..

Phasors - Phasors are vectors, which rotate around an origin with a angular speed They have the following properties. (i) Phasors rotate clockwise about the origin with angular speed equal to the angular frequency of current and voltage. (ii) The length of the phasors represent the amplit..

. An ideal gas is one for which Equation (3) holds good at all pressures and temperatures. This is an idealized model. It works best at very low pressures and high temperatures, when the gas molecules are far apart and in rapid motion. It is reasonably good (within a few per cent) at moderate press..

Predict the effect on the electrical properties of a silicon crystal at room temperature (300 K) if every millionth silicon atom is replaced by an atom of indiu..

Eight charges having the values shown in figure are arranged symmetrically on a circle of radius 0.4 m in air. Calculate the potential at the centre ..

Predict the effect on the electrical properties of a silicon crystal at room temperature (300 K) if every millionth silicon atom is replaced by an atom of indium. Given: concentration of atoms = 5 x 10 2 8 m - 3 ; intrinsic carrier concentration = 1.5 x 10 1 6 m - 3 ; intrinsic conductivi..

A steady current of 10.0 A is passed through a water voltameter for 300s. Estimate the volume of H 2 evolved at standard temperature and pressure. Use the known value of Faraday's constant. Relative molecular mass of H 2 is 2.016 and molar volume = 22.4 litres (volume of 1m of an ..

The principle of homogeneity of dimensional equation is used to derive a relation between various physical quantities. To derive a physical relation, the dependent factors of a given physical quantity is found. Assuming its dimensions in terms of th..

Suppose X = a - b Let D a and D b be absolute errors in measurements of quantities a and b, values of a and b and D X be maximum error in X. Maximum absolute error in X = Maximum absolute error in a + Maximum absolute error in b From equations (1) and (2) it is evident t..