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Author Archives: admin

Difference between nuclear fission and nuclear fusion

Nuclear Fission “Such a reaction in which a heavy nucleus like that of uranium splits up into two nuclei of equal size along with the emission of energy during the reaction is called fission reaction” Otto Hahn and Fritz Strassmann of Germany while working upon the nuclear reactions made a starling discovery. They observed that when slow moving neutrons are ...

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Difference between natural and artificial radioactivity

what is radioactivity? It has been observed that those elements whose charge number Z is greater than 82 are unstable. Some invisible radiations, that can effect the photographic plates emanate out of these elements. Such elements are called radioactive and the phenomenon is called radioactivity. The radiations coming out of the radioactive elements are called alpha (α) , beta (β),and ...

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Half life of radioactive elements in physics with examples

What is Half Life of Radioactive Element? “The Time during which half of the unstable radioactive nuclei disintegrate is called the half-life of the sample of radioactive element.” We have seen that whenever an α or β-particle is emitted from a radioactive element,it is transformed into some other element. This radioactive decay process is quite random and is not subjected to any ...

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Heisenberg uncertainty principle: Statement,formula & equation

 Heisenberg  uncertainty principle Statement Uncertainty principle is defined as:”It is impossible to measure simultaneously both the position and momentum of a microscopic particle with accuracy or certainty.” When we are studying a large moving object say a planet,then we can follow its definition path on which it travels.If we know its initial position and momentum,then we can predict its position and ...

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How to use Zener diode as voltage regulator?

what is Zener Diode? A major application for zener diodes is as a type of voltage regulator for providing stable reference voltages for use in power supplies,voltmeters,and other instruments. In this section, you will see how the zener maintains a nearly constant de voltage under the proper operating conditions. You will learn the conditions and illustrations for properly using the ...

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what is Difference between motional and induced emf?

Motional EMF “The emf induced by the motion of a conductor across a magnetic field is called motional emf”. In the previous section we have studied that when conductor is moved across a magnetic field, an emf induced between its ends. The emf of the moving conductor is similar to that of a battery,i.e., if the ends of the conductor ...

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applications and uses of diodes in everyday life

What is a semiconductor 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 ...

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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 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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