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Author Archives: admin

Difference between amplitude modulation and frequency modulation

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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Different types of rectifiers and their applications in daily life

What is Rectification? Conversion of alternating current into direct current is called rectification. Semiconductor diodes are extensively used for this purpose. Types of rectifier There are three common types of rectification: Half wave rectification Full wave rectification Full Wave Bridge Rectification Voltage multipliers rectification Half Wave Rectification An alternating voltage of Time period T is called input voltage is applied ...

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Different types of motors and their applications

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. What is the working principle of electric motor? When a current-carrying conductor is located in an external magnetic field perpendicular to the conductor, the conductor experiences a ...

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How materials are magnetized and demagnetized?

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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Difference between donor and acceptor impurities 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 the ...

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Resonance:examples of resonance in everyday life

Resonance definition physics 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 a period comparable ...

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Archimedes principle formula and law of floatation with applications

State 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 ...

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Difference between specific heat capacity and heat capacity

Specific Heat Capacity definition 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. Specific heat formula 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 ...

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thermal Expansion:Formula,examples and applications

Thermal expansion definition 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 ...

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Different types of transducers and their applications

What are transducers? “A transducer is an electronic device that converts energy from one form to another.”Common examples include microphones,loudspeakers,thermometers,position and pressure sensors and antenna.Although not generally thought of as transducers,photocells,LEDs,and even common light bulbs are transducers. Efficiency of transducer Efficiency is an important consideration in any transducer.Transducer efficiency is defined as:”The ratio of the power output in the desired ...

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