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Author Archives: admin

how do Diodes work

Diode: A diode is a two-terminal device formed by two doped regions of silicon separated by a pn junction. The most common category of diode, known as the general-purpose diode,is covered. Other names, such as rectifier diode or signal diode, depend on the particular type of application for which the diode was designed. You will learn how to use a ...

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What is modulation and demodulation

What is modulation? Until the process of superimposing a low frequency (long wave) voice information component on a high frequency (short wave) carrier signal was perfected,the most widely used form of communication was a system based on the transmission of a continuous wave (CW) signal.With this system,the signal was interrupted periodically (Morse code) to produce a coded message.The CW system ...

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Half wave rectifier experiment

What is Rectification? Conversion of alternating current into direct current is called rectification. Semiconductor diodes are extensively used for this purpose. There are two common types of rectification: Half wave rectification Full wave rectification Half Wave Rectification: An alternating voltage of Time period T is called input voltage is applied to a diode D which is connected in series with ...

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How does electric motor works

What is Electric Motor? An electric motor is an electromechanical device that converts electrical energy into mechanical energy.Electrical motors can be run as generators and vice versa, although this is not always practical. The Motor Principle: When a current-carrying conductor is located in an external magnetic field perpendicular to the conductor, the conductor experiences a force perpendicular to itself and ...

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magnets how do they work

What are Magnets? A permanent magnet has a magnetic field surrounding it. A magnet field can be envisioned to consist of lines of force that radiate from the north pole (N) to the south pole (S) and back to the north pole through the magnetic material. A permanent magnet, such as the bar magnet has a magnetic field surrounding it that ...

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What is doping in semiconductor

What is Doping ? The conductivity of intrinsic semiconductor is not so good to use them for making electronic devices. To increase the conductivity of intrinsic semiconductor, some impurities are added. This process of adding impurities of intrinsic semiconductor is called doping. The doping is of two types: Accepter Doping Donor Doping Accepter Doping : If the trivalent element from ...

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What is Resonance in physics

What is the meaning of Resonance? Resonance occurs when the frequency of the applied force is equal to one of the natural frequencies of vibration of the forced or driven harmonic oscillator. Associated with the motion of a driven harmonic oscillator, there is a very striking phenomenon, known as resonance. It rises if the external driving force is periodic with ...

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Archimedes density measurement

Archimedes Principle: When an object is totally or partially immersed in a liquid, an upthrust acts on it equal to the weight of the liquid it displaces. An air filled balloon immediately shoots up to the surface when released under water. The same would happen if a piece of wood is released under water. We might have noticed that a ...

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Specific Heat capacity formula

Specific Heat Capacity: Specific heat of a substance is the amount of heat required as raise the temperature of 1 kg mass of that substance through 1 K. Generally, when a body is heated, its temperature increases. Increase in the temperature of a body is found to be proportional to the amount of heat absorbed by it. It has also ...

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thermal Expansion coefficients of metals

Thermal expansion: Most of the substances solids, liquid and gases expand on heating and contract on cooling. Their thermal expansions and contractions are usually small and are not noticeable. However, these expansions and contractions are important in our daily life. The kinetic energy of the molecules of an object depends on its temperature. The molecules of a solid vibrate with ...

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