application of photocells in security system

A photocell converts the change in the intensity of light into a change in the electric current. The diagram shows a photocell circuit. The cathode is made of photosensitive materia..

We know that the moon revolves around the Earth in a circular orbit and the Earth revolves around the sun in an elliptical orbi..

Applications of Photoelectric Cells - Photocells are used in television camera to reproduce sound recorded on films, in counting devices, in burglar and fire alarms, to measure the temperature of stars, to study the spectrum of heavy bodies, to operate street light, to compare t..

Photocells are used in television camera to reproduce sound recorded on films, in counting devices, in burglar and fire alarms, to measure the temperature of stars, to study the spectrum of heavy bodies, to operate street light, to compare the illuminating powers of two sources, in ..

Applications of the Le Chatelier's Principle - The Le Chatelier's principle has a great practical significance for all physical and chemical systems. Applicability of this principle to some of the systems is described bel..

Application of Electrochemical Series [ECS] - 1) Higher the SRP, greater is the tendency to accept e - , higher is the tendency to get reduced and greater is the oxidizing power. Fluorine system (F 2 /F) - has the highest SRP and hence it possesses highest oxidising power and th..

Application of Determinants, Area of a Triangle, Cramer's rule for the solution of a system of equations in 2 variables, Consistency of a system of linear equation. Application of Matrices, Homogeneous Equations (Constant = 0), Non Homogenous Equ..

One of the important applications of Newton's law is to estimate masses of binary stars. A binary star is a system of two stars orbiting round their common center of mass. Any irregularity in the motion of a star indicates that it might be another star or a planet going round t..

Higher the SRP, greater is the tendency to accept e - , higher is the tendency to get reduced and greater is the oxidizing power. Fluorine system (F 2 /F) - has the highest SRP and hence it possesses highest oxidising power and this increases down the grou..