physics

Consider a rigid body rotating about a fixed axis AB. Consider a particle 'p' of mass 'm' rotating in a circle of radius 'r..

Summary - When certain metals are heated to a high temperature, they emit thermions (electrons) and the phenomenon is called thermionic emission Cathode rays are a stream of negatively charged particles emitted from the cathode of an evacuated bulb, when a voltage of nearly 3000 volts given across ..

The dimensional formula of a physical quantity can be obtained by defining its relation with other physical quantities and then expressing these quantities in terms of mass [M], length [L] and time [..

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 these factors, the fin..

Example, To check the correctness of v = u + at, using dimensions Dimensional formula of final velocity v = [LT - 1 ] Dimensional formula of initial velocity u = [LT - 1 ] Dimensional formula of acceleration x time, at = [LT - 2 x T] = [LT - 1 ] Dimensions on both sides of each term is the same. He..

Physical World and Measurement..

The goal of physics is to provide an understanding of nature. The science of physics was developed to explain our physical environmen..

It states that if the dimensions of each term on both the sides of equation are same, then the physical quantity will be corre..

Temperature is a physical quantity and hence, measurable. In fact in SI system, temperature is a fundamental physical quantit..