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What Is Electric battery? Scroll Down To Download! A battery is a device consisting of one or more electrochemical cells with external connections for powering electrical devices such as flashlights, mobile phones, and electric cars. When a battery is supplying electric power, its positive terminal is the cathode and its negative terminal is the anode. The terminal marked negative is the source of electrons that will flow through an external electric circuit to the positive terminal. When a battery is connected to an external electric load, a redox reaction converts high-energy reactants to lower-energy products, and the free-energydifference is delivered to the external circuit as electrical energy. Historically the term "battery" specifically referred to a device composed of multiple cells, however the usage has evolved to include devices composed of a single cell. Various cells and batteries (top left to bottom right): two AA, one D, one handheld ham radiobattery, ...

How Does a Generator Create Electricity? How Generators Work Scroll Down To Download! Generators are useful appliances that supply electrical power during a power outage and prevent discontinuity of daily activities or disruption of business operations. Generators are available in different electrical and physical configurations for use in different applications. In the following sections, we will look at how a generator functions, the main components of a generator, and how a generator operates as a secondary source of electrical power in residential and industrial applications. How does a generator work? An electric generator is a device that converts mechanical energy obtained from an external source into electrical energy as the output. It is important to understand that a generator does not actually ‘create’ electrical energy. Instead, it uses the mechanical energy supplied to it to force the movement of electric charges present in the wire of its windings through an ...

How Inverter Works? Scroll Down To Download! A power inverter, or inverter, is a power electronic device or circuitry that changes direct current (DC) to alternating current(AC). The input voltage, output voltage and frequency, and overall power handling depend on the design of the specific device or circuitry. The inverter does not produce any power; the power is provided by the DC source. A power inverter can be entirely electronic or may be a combination of mechanical effects (such as a rotary apparatus) and electronic circuitry. Static inverters do not use moving parts in the conversion process. Power inverters are primarily used in electrical power applications where high currents and voltages are present; circuits that perform the same function for electronic signals, which usually have very low currents and voltages, are called oscillators. Circuits that perform the opposite function, converting AC to DC, are called rectifiers. MOSFETs or Transistors are used for t...

What Is Volt? Scroll Down To Download! The volt (symbol: V) is the derived unit for electric potential, electric potential difference(voltage), and electromotive force. It is named after the Italian physicist Alessandro Volta (1745–1827). The "conventional" volt, V90, defined in 1987 by the 18th General Conference on Weights and Measures[3] and in use from 1990, is implemented using the Josephson effect for exact frequency-to-voltage conversion, combined with the caesium frequency standard. For the Josephson constant, KJ = 2e/h (where e is the elementary charge and h is the Planck constant), a "conventional" value KJ-90 = 0.4835979 GHz/μV was used for the purpose of defining the volt. As a consequence of the 2019 redefinition of SI base units, the Josephson constant was redefined in 2019 to have an exact value of KJ = 483597.84841698... GHz⋅V−1, which replaced the conventional value KJ-90. This standard is typically realized using a series-connected arr...

What is AC Current? Scroll Down To Download! Alternating current (AC) is an electric currentwhich periodically reverses direction, in contrast to direct current (DC) which flows only in one direction. Alternating current is the form in which electric power is delivered to businesses and residences, and it is the form of electrical energy that consumers typically use when they plug kitchen appliances, televisions, fans and electric lamps into a wall socket. A common source of DC power is a battery cell in a flashlight. The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage. The usual waveform of alternating current in most electric power circuits is a sine wave, whose positive half-period corresponds with positive direction of the current and vice versa. In certain applications, like guitar amplifiers, different waveforms are used, such as triangular or square waves. Audio and radio signals carried on electrical w...

What Is Resistor? Scroll Down To Download! A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses. High-power resistors that can dissipate many wattsof electrical power as heat, may be used as part of motor controls, in power distribution systems, or as test loads for generators. Fixed resistors have resistances that only change slightly with temperature, time or operating voltage. Variable resistors can be used to adjust circuit elements (such as a volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical activity. Resistors are common elements of electrical networks and electronic circuits and are ubiquitous in electronic equipment. Practical resistors as discrete components can be composed o...

What Is Mosfet? Scroll Down To Download! The metal–oxide–semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET), also known as the metal–oxide–silicon transistor (MOS transistor, or MOS), is a type of insulated-gate field-effect transistor(IGFET) that is fabricated by the controlled oxidation of a semiconductor, typically silicon. The voltage of the covered gate determines the electrical conductivity of the device; this ability to change conductivity with the amount of applied voltage can be a used for scientific purpose samplifying or switching electronic signals. The MOSFET was invented by Mohamed M. Atalla and Dawon Kahng at Bell Labs in 1959. It is the basic building block of modern electronics, and the most frequently manufactured device in history, with an estimated total of 13 sextillion (1.3×1022) MOSFETs manufactured between 1960 and 2018. It is the dominant semiconductor device in digital and analog integrated circuits(ICs), and the most common power devi...

What is Teleportation?  Scroll Down To Download!  Can teleportation be possible? As of May 2020, teleportation has not yet been implemented in the real world. There is no known physical mechanism that would allow this. Frequently appearing scientific papers and media articles with the term teleportation typically report on so-called "quantum teleportation", a scheme for information transfer. What is a teleport machine? Teleportation, as it's commonly understood, suggests the movement of one object to another place, perhaps through the disassembly and reassembly of atoms or other similarly impossible means. This project teleports items by scanning them layer by layer and then grinding them away. Has teleportation been done? Quantum teleportation of data had been done before but with highly unreliable methods. On 26 February 2015, scientists at the University of Science and Technology of China in Hefei, led by Chao-yang Lu and Jian-Wei Pan carried out the...

Working From Home Because of COVID-19? Scroll Down To Download!  🔻 # First of all, you have to know that working from an office and working from home is way too different. In my many years of experience in this industry, I have learned that many people think that those working from home as a Virtual Assistant are having the time of their life. Even though they may have more flexibility, it takes so much self-discipline to be able to work efficiently from home. If you are "forced" to work from home because your company requires you to do so for health and safety reason, then there will be a lot of adjustments for you. Here are some advice from experienced Virtual Assistants: Stick to a schedule I'm sure the first thing you will be asking yourself when you wake up and realize that you are not commuting to your office is, "What am I going to do?" Yes, working from home can be very disorienting so make sure that you stick to your daily routin...

The speed of Sound in Vacuum?  Scroll Down To Download!  The speed of sound in a vacuum is zero meters per second, as sound cannot travel in a vacuum. Sound is a wave, which means it spreads through the vibration of particles in a medium, such as water or air. Since a vacuum is empty space, there is no medium for the sound to travel through. The speed of sound in air mainly depends on the temperature of the air. On average, it is about 343 meters per second (1,125 feet per second), which is faster than the speed of sound in a vacuum. Can sound travel in a vacuum? In the vacuum of space, there are no (or very, very few) particles to vibrate, so sound cannot travel through this medium. ... Radio waves travel perfectly fine through a vacuum because they are a type of electromagnetic wave (light), and electromagnetic waves do not need a medium to travel through. What is the formula for speed of sound in air? Sound Speed in Gases Therefore for air at T = K = °C ...

What Is laser light?  Scroll Down To Download!  A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term "laser" originated as an acronym for "light amplification by stimulated emission of radiation".[1][2][3] The first laser was built in 1960 by Theodore H. Maiman at Hughes Research Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light which is coherent. Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography. Spatial coherence also allows a laser beam to stay narrow over great distances (collimation), enabling applications such as laser pointers and lidar. Lasers can also have high temporal coherence, which allows them to emit light with a very narrow spectrum, i.e., they can emit a single col...

What Is Tasla Coil?  Scroll Down To Download!  The first system that could wirelessly transmit electricity, the Tesla coil was a truly revolutionary invention. Early radio antennas and telegraphy used the invention, but variations of the coil can also do things that are just plain cool — like shoot lightning bolts, send electric currents through the body and create electron winds. Tesla developed the coil in 1891, before conventional iron-core transformers were used to power things like lighting systems and telephone circuits. These conventional transformers can't withstand the high frequency and high voltage that the looser coils in Tesla's invention can tolerate. The concept behind the coil is actually fairly simple and makes use of electromagnetic force and resonance. Employing copper wire and glass bottles, an amateur electrician can build a Tesla coil that can produce a quarter of a million volts. The setup A Tesla coil consists of two parts: a primary coil a...

What is a Taser? Scroll Down To Download!  Taser, also called taser, in full Tom A. Swift Electric Rifle, handheld device that incapacitates a person by transmitting a 50,000-volt electric shock. The Taser fires two small darts, connected to the device with thin wires, up to a distance of approximately 11 metres (35 feet). The darts can penetrate clothing and, once they make contact with the target, deliver the electric shock, which disrupts the target’s nervous system, resulting in temporary incapacitation. The Taser is not considered a firearm, because it uses compressed nitrogen to launch the darts. A Taser can also be used as a stun gun by pressing it directly against the target’s body, thereby administering the electric shock. How does a Taser gun work? Taser guns work the same basic way as ordinary stun guns, except the two charge electrodes aren't permanently joined to the housing. Instead, they are positioned at the ends of long conductive wires, attached to the ...

What is EMP Gun? Scroll Down To Download!  A nuclear electromagnetic pulse is the abrupt pulse of electromagnetic radiation resulting from a nuclear explosion. ... NEMP weapons are designed to maximize such EMP effects as the primary damage mechanism, and some are capable of destroying susceptible electronic equipment over a wide area. How does an EMP work? Upon colliding with molecules in the Earth's atmosphere, the downward-directed gamma rays create a powerful electromagnetic energy field. The EMP doesn't hurt humans directly, but it makes some electrical devices and attached cables act as antennas, hitting electronic systems with a surge of high-voltage current. Does an EMP permanently destroy electronics? Nuclear EMP does and can not destroy "everything electronic". The primary electric system nuclear EMP would damage would be the electric power grid and that's about it. It wouldn't be permanent because damaged components can be replaced. ...

What is Radiation? Scroll Down To Download Outside the protective cocoon of the Earth’s atmosphere is a universe full of radiation – it is all around us. Say the word "radiation" to three different people, and you'll probably get three different reactions. Your aunt may tell you how radiation destroyed her cancer. Your neighbor might mention the "duck and cover" procedures of his day. And your comics-loving friend will explain how gamma rays turned Bruce Banner into The Hulk. Radiation comes in many forms and is all around us, all the time. But what is radiation? Radiation is a form of energy that is emitted in the form of rays, electromagnetic waves, and/or particles. In some cases, radiation can be seen (visible light) or felt (infrared radiation), while other forms—like x-rays and gamma rays—are not visible and can only be observed with special equipment. Although radiation can have negative effects both on biological and mechanical systems, it can...

What Is Wormholes Scroll Down To Download  Wormholes are solutions to the Einstein field equations for gravity that act as "tunnels," connecting points in space-time in such a way that the trip between the points through the wormhole could take much less time than the trip through normal space. Wormholes contain two mouths, with a throat connecting the two. The mouths would most likely be spheroidal. The throat might be a straight stretch, but it could also wind around, taking a longer path than a more conventional route might require. Earlier this year, physicists proposed an answer in the form of “wormholes,” or gravitational tunnels. The group showed that by creating two entangled black holes, then pulling them apart, they formed a wormhole — essentially a “shortcut” through the universe — connecting the distant black holes. A wormhole is a theoretical passage through space-time that could create shortcuts for long journeys across the universe. Wormholes are pr...