Found 151 Articles for Science & Technology

Robotics is the fast emerging technology today. Robots are being designed to be used for various activities from daily domestic chores to military operations. These Robots are designed based on the idea of Artificial Intelligence.What is Artificial Intelligence?A machine is initially developed to take instructions from the user and process it according to a pre-designed program and give the output. Whereas if this machine can do something more extraordinary, other than simply taking the instructions and matching with previously fed data, that would be great. Such a thought is the basis for Artificial Intelligence. This can be understood as the ... Read More

A Light bulb generally has a wire connected to it. But this levitating light bulb just hovers in the air above a wooden block and draws power from it. This bulb even rotates if spun. This wooden block is of course connected to the switchboard for power.How Did It Hover?This levitating light bulb makes the look interesting when it just hovers gracefully above the wooden block while it glows. As it is evident from the basic principles of magnetism that like poles repel, the bottom of the bulb contains a magnet and lets it hover on the wooden block which ... Read More

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

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

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

Airwave is an OTA (Over-The-Air) antenna. Unlike cable TV, this is a wireless antenna that offers you with all the stuff that a normal cable TV used to offer such as local news, daily soaps, prime-time shows, sports etc. with crystal clear HD quality. This is the first OTA antenna that works with the help of your Wi-fi network.Mohu AirwaveMohu is the maker of Mohu Sky, which has launched Mohu Airwave in the last year’s International Consumer Electronics Show. The Airwave is an OTA antenna which can be placed anywhere in the house and provides optimal signal reception that makes ... Read More

Since a few decades, plastic is rapidly affecting the environment in a drastic way and if doesn’t get stopped will eventually engulf mankind with its venomous waste. As the need for bio-degradable products is alarming, experiments are taking place to replace plastic.The plastic water bottles that are being used now take at least 450 years to decompose, while PET bottles are almost non-biodegradable and are resulting in billions of pounds of plastic waste in landfills, beaches, roadsides, and waterbodies.Working for SolutionSome scientists are working on it to develop not only a bio-degradable but also an edible water bottle that have ... Read More

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

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

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