non physical quantities

It is the expression of accuracy of a physical quantity. The value in digits, accurately known in a measurement plus one digit that is not certain, is called significant figures. Significant figures is directly proportional to the accuracy of measurement. Eg., a reading of 6.34 ..

Motion: Whenever a body changes its position continuously with respect to the position of other bodies around it then it is said to be in motion. Rest: An object which does not change its position with respect to its surroundings is said to be at rest. Distance: It is the actual length of t..

In 1851, William Thomson (later Lord Kelvin) argued that each element of a single conductor would be a source of emf whenever there is a temperature gradient, i.e., the conductor has a non-uniform temperature. Suppose a current is maintained in a conductor with some temperature gradient. ..

The ability of a material to conduct heat is measured by thermal conductivity (defined below) of the material. Consider a slab of uniform cross-section A and length x. Let one face of the slab be maintained at temperature T 1 and the other at T 2 . Also let us assume the remaining surfa..

. The three quantities, c , the relative magnetic permeability m r , and the magnetic permeability are related as follows: m = m 0 m r m r = 1+x Magnetic materials are broadly classified as: diamagnetic, paramagnetic, and ferromagnetic. For diamagnetic materials c is negative and generall..

Four Categories of Physical Quantities - Based on dimensions, physical quantity can be classified under four categori..

Based on dimensions, physical quantity can be classified under four categorie..

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..

The constants having no dimensions. E.g., p , e, 1, 2,3 .e..

X is the sum of 2 observed quantities a and b. X = a + b Maximum absolute error in X = Maximum absolute error in a + Maximum absolute error i..