Found 169 Articles for Education

How can we locate the Quiescent point of a transistor?

Knowledge base
Updated on 30-Jul-2019 22:30:24
The Q-point or quiescent point of a transistor is considered during amplification, as this is the point of amplification where the signal is completely amplified without any kind of attenuation. This is located when the transistor is operated in the active region.Locating On A GraphWhen a value for the maximum possible collector current is considered, that point will be present on the Y-axis, which is nothing but the Saturation point. As well, when a value for the maximum possible collector-emitter voltage is considered, that point will be present on the X-axis, which is the Cutoff point.When a line is drawn ... Read More

What is a Half Wave Dipole Antenna?

Knowledge base
Updated on 30-Jul-2019 22:30:24
The dipole antenna is a widely popular antenna that is used mostly for the reception. The dipole antenna is cut and bent for effective radiation. The length of the total wire, which is being used as a dipole, equals half of the wavelength (i.e., l = λ/2). Such an antenna is called as a half-wave dipole antenna, also known as Hertz antenna. This antenna which is mostly used in radio receivers operates is around 3KHz to 300GHz.Construction & Working of Half-Wave DipoleThe edge of the dipole has maximum voltage. This voltage is alternating (AC) in nature. At the positive peak ... Read More

What is the role of taxonomy in biodiversity conservation?

Knowledge base
Updated on 30-Jul-2019 22:30:24
The classification of things while describing and naming them can be understood as Taxonomy. This helps to identify any developmental and experimental work that needs to be done.Simply put, why would anyone mix the shoes in shoe rack with the bed sheets in a cupboard? Taxonomy is our inheritance where we define the places to which they belong. In the same way, it provides an easy to identify the categories of the species so as to have an idea of the existing conditions and to plan necessary measures for the biodiversity conservation.What is Bio-diversity Conservation?Bio-diversity is regarded as the foundation ... Read More

Who were the early Mathematicians?

Knowledge base
Updated on 30-Jul-2019 22:30:24
Mathematics is the most important subject since ages like from the times of Mesopotamians, Egyptians, and Greek people. It has been understood that the initial stages of Mathematics have evolved since 35000 BC where they had first notched the tally bones. Africans, Sumerians, Egyptians, Babylonians, Chinese, Indians and Greeks were all the early Mathematicians.Indian ScholarsIt was understood that during 1200 BC to the 18th century, many scholars such as Aryabhatta, Brahmagupta, Bhaskaracharya, Mahavira, Madhava, Nilakantha Somayaji etc. have contributed crucial theorems of Mathematics starting from the invention of Zero to negative numbers, arithmetic, algebra, trigonometry, geometry, and many astronomical calculations.Many ... Read More

What is a musical scale?

Knowledge base
Updated on 30-Jul-2019 22:30:24
Music is the language of the soul where the sound is organized in time intervals to deliver a pleasant rhythm. To put in layman’s terms, while rhythm can be understood as beat, the high and low notations of that beat can be the pitch. These pitch notes at different levels can be understood as scale.The scale is a set of musical notes ranging from low pitch to high pitch usually, where the pitch is a fundamental frequency and scale can be demonstrated at any pitch level. The row of musical notes when played on a certain pitch level, can be ... Read More

Explain the construction and working of a Microwave Schottky Barrier diode.

Knowledge base
Updated on 30-Jul-2019 22:30:24
This is a simple diode that exhibits non-linear impedance. These diodes are mostly used at microwave detection and mixing.ConstructionA semi-conductor pellet is mounted on a metal base. A spring-loaded wire is connected with a sharp point to this silicon pellet. This can be easily mounted into coaxial or waveguide lines. The below figure gives a clear picture of this.OperationWith the contact between semiconductor and the metal, a depletion region is formed. The metal region has a smaller depletion width, comparatively. When contact is made, electron flow occurs from semi-conductor to the metal. This depletion builds up a positive space charge ... Read More

Explain the construction and working of a Microwave Varactor diode.

Knowledge base
Updated on 30-Jul-2019 22:30:24
A voltage variable capacitance of a reverse biased junction can be termed as a Varactor diode. A varactor diode is a semiconductor device in which the junction capacitance can be varied as a function of the reverse bias of the diode.The CV characteristics of a typical Varactor diode and its symbols are shown in the below figure.The junction capacitance depends on the applied voltage and junction design. If the junction is reverse biased, the mobile carriers deplete the junction, resulting in some capacitance, where the diode behaves as a capacitor, with junction acting as a dielectric. The capacitance decreases with ... Read More

What is a waveguide and what are its types?

Knowledge base
Updated on 30-Jul-2019 22:30:24
Generally, if the frequency of a signal or a particular band of signals is high, the bandwidth utilization is high as the signal provides more space for the other signals to get accumulated. But the high-frequency signals can’t travel long distances without getting attenuated. We have studied the transmission lines that help the signals to travel longer distances.A WaveguideMicrowaves propagate through microwave circuits, components and devices, which act as a part of Microwave transmission lines, broadly called as Waveguides.DefinitionA hollow metallic tube of the uniform cross section for transmitting electromagnetic waves by successive reflections from the inner walls of the ... Read More

What are Microwaves? What are they used for?

Knowledge base
Updated on 30-Jul-2019 22:30:24
Electromagnetic Spectrum has all the ranges of electromagnetic radiation. Radiation is the energy that travels and spreads out, as it propagates. Of all the waves, Microwaves are a special type of electromagnetic radiation that is used in many ways from cooking simple popcorn to study the nearby galaxies !!!ApplicationsThere are a wide variety of applications for Microwaves, which are not possible for other radiations. They are:Wireless CommunicationsFor long distance telephone callsBluetoothWiMAX operationsIn Outdoor broadcasting transmissionsIn broadcast auxiliary servicesRemote pickup unitStudio/transmitter linkDirect broadcast satellite (DBS)Personal communication systems (PCSs)Wireless local area networks (WLANs)Cellular video systems (CV)Automobile collision avoidance systemElectronicsFast jitter-free switchesPhase shiftersHF ... Read More

What is the concept of Heinz's dilemma in Kohlberg's theory?

Knowledge base
Updated on 30-Jul-2019 22:30:24
Kohlberg proposed that people progress in Moral reasoning based on their Ethical behavior. He postulated this theory based on the thinking of younger children throughout their growing period as adults. He conveyed that younger children make judgments based on the consequences that might occur and the older children make judgments based on their intuitions.He believed that there are six stages of Moral development which could be more generally classified into three levels. They are the Pre-conventional stage, the Conventional Stage, and the Post-conventional stage. To explain this, Lawrence Kohlberg quoted an example popularly called as Heinz’s Dilemma.The Story of HeinzA ... Read More
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