Application and Uses of the Bomb Calorimeter
The bomb calorimeter is an instrument used in measuring the heat of combustion of a substance. Combustion is always accompanied by the evolution of heat….
Physics
The Principle of Recording Sound on a Tape or Film
We shall consider the principles of recording sound on tape and on film, and its reproduction. In the world of electronics where music and sound…
The Working Principle and Uses of a Sextant
The sextant is an instrument used in navigation for measuring the angle of elevation of the sun or stars. It consists essentially of a fixed…
The Working Principle and Application of a Stroboscope
A stroboscope is an arrangement which can make a rotating object appear at rest when it is viewed, and thus enables a spinning wheel, for…
The Principles and Uses of Electrophorus and Microphone
A device which provides an almost unlimited supply of charge, by induction, was invented by Volta about 1800; it is called an electrophorus. It consists…
Significance of the Hall Effect On SemiConductors
In 1879, Hall found that an e.m.f. is set up transversely or across a current-carrying conductor when a perpendicular magnetic field is applied. This is…
Application, Working Principles and Uses of Potentiometer
Pointer instruments are useless for very accurate measurements: the best of them have an intrinsic error of about 1 percent of full scale. Where greater…
Laboratory and Industrial Uses of Multimeter and Voltmeter
A multimeter instrument is one which is adapted for measuring both current and voltage. It has a shunt R as shown, and a series of…
How to Convert Milliammeter Into Voltmeter and Ammeter
Ohm’s law enables us to use a milliammeter as a voltmeter. Let us suppose that we have a moving – coil instrument which requires 5…
Definition of Graham’s Law and Explanations of Thermal Agitations
What are Thermal Agitations? When a gas passes through a porous plug, a cotton-wool wad, for example, it is said to diffuse’. In that it…