Found 83 Articles for Miscellaneous

Phishing is one of the most common social engineering attacks conducted by cybercriminals to trap users into providing sensitive information or install malware into their system. According to the FBI, Phishing was the most conducted cybercrime in 2020; the number got doubled from 2019 to 2020.Though the final goal is the same, i.e., to attack victims psychologically, the attackers use different means to conduct Phishing.Depending on the way it is conducted, Phishing can be categorized into various types. In this post, we would discuss the five most popular types of Phishing attacks.Email PhishingPhishing through emails is pretty widespread among cyber ... Read More

While browsing the Internet, if you have received a virus alert from Microsoft stating that "YOUR COMPUTER HAS BEEN BLOCKED" because the system is infected with viruses and asking to call you, it is probably a scam.In this post, we would discuss how such fake Microsoft Warning Pop-Ups are generated and how to remove them.What is Microsoft Virus Warning Pop-UpsCybercriminals use various tricks to manipulate users and get into their systems. One common trick is creating fear among users by presenting them fake alerts pretending from genuine organizations. Microsoft Virus Warning pop-up is one of those fake alerts. In this, ... Read More

Pop-up Ads can be pretty annoying while browsing the Internet. Apart from that, cybercriminals can exploit pop-ups by infecting them with malware so that when users click on them, the malware can infiltrate their device easily.It is better to block these annoying and malicious pop-ups instead. Google Chrome is one of the most popular browsers on the internet. Its users are most affected by the pop-up viruses. If you are a Google Chrome browser user, this post will guide you on how to block pop-ups on your browser.Block Pop-Ups on Google Chrome Windows/macOS/LinuxFor Windows, macOS, and Linux users, here is ... Read More

Most people consider a computer virus and a computer worm as equivalent. Although their primary aim is to create havoc by infiltrating a system, the way they attack, spread, and replicate sets them apart.In this post, we would walk through in detail what the computer virus and the computer worm are and how they are different from each other.What is a VirusA virus is one of the most common and oldest computer malware. Like a biological virus spreads from human to human and damages their body, a computer virus spreads from computer to computer and corrupts user files, documents, and ... Read More

In recent times, there has been enhancements in the percentage of people visiting the Dark Web. It is mainly because of its secretive nature. Most people don't know about the dangers and simply surf it without any knowledge. In this article, we will discuss briefly about what Deep Web and Dark Web are in reality. We will discuss how they differ from each other. We will also discuss whether it is illegal to visit the dark web.Levels of the InternetTo understand the dark and the deep web, you should know about the Levels of the Internet because they both are ... Read More

Average Value of Alternating QuantityThe arithmetical average of all the instantaneous values of an alternating quantity over one cycle is known as the "Average Value of Alternating Quantity".$$Average\:value=\frac{Sum\:of\:all\:instantaneous\:values\:over\:one\:cycle}{Number\:of\:instants}$$$$=\frac{Total\:are\:under\:the\:curve\:for\:time\:period\:T}{Time\:Period\:(T)} $$$$=\frac{i_{1}+i_{2}+i_{3}+...+i_{n}}{n}$$Average Value of Symmetrical WavesIn case of symmetrical waves like sinusoidal voltage or current, the average value over one cycle is zero. It is because the positive half cycle is exactly equal to the negative half cycle. But the average value of positive or negative half cycle is not zero. Therefore, in case of symmetrical waves, the average value is calculated for half cycle.$$Avg\:value = \frac{Sum\:of\:all\:instantaneous\:values\:over\:half\:cycle}{Number\:of\:instants\:of\:half\:cycle}$$Average Value of Unsymmetrical WaveIn case of ... Read More

A unit of measurement can be defined as a quantity chosen as a standard in terms of which other quantities may be expressed.Engineering is an applied science dealing with a variety of physical quantities (a physical quantity is one which can be measured) like time, speed, voltage, resistance etc. Hence, for the measurement of these quantities standard units are defined.There are a number of electrical units defined which are based on the SI system of units.Standard Electrical Units of MeasurementElectrical QuantitySymbol for QuantityMeasuring UnitSymbol for UnitChargeQ or qCoulombCVoltageV or vVoltVEMFE or eVoltVCurrentI or iAmpereAResistanceR or rOhmΩInductanceLHenryHCapacitanceCFaradFConductanceGMho or Siemen℧ or Ω-1or ... Read More

A band pass filter (BPF) is a circuit that passes frequencies within a certain range and rejects all the frequencies outside the range. This range of band pass filter is known as Bandwidth of the filter.The Bandwidth of band pass filter is given by, $$Bandwidth=f_{high}-f_{low}$$Where, fhigh and flow are the higher and lower cut off frequencies.The values of fhigh and flow are given by, $$f_{high}=\frac{1}{2\pi\:R_{2}C_{2}}$$$$f_{low}=\frac{1}{2\pi\:R_{1}C_{1}}$$In the frequency response curve or bode plot of the band pass filter, the signal is blocked(attenuated) at low frequencies with the output increasing at the rate of +20dB/Decadeuntil the frequency reaches the Lower Cut off ... Read More

Wires and TracesComponent NameSymbolWires or ConductorTrace Junction or Connected WiresTrace Crossing or Unconnected WiresGroundsComponent NameSymbolGround or EarthSignal GroundChassis GroundSourcesComponent NameSymbolSingle CellBattery (Combination of cells)Photovoltaic Cell (Solar Cell)Independent or Constant Voltage SourceControlled or Dependent Voltage SourceIndependent or Constant Current SourceControlled or Dependent Current SourceAC voltage SourceResistorsComponent NameSymbolFixed ResistorRheostat (Variable Resistor)PotentiometerThermistor or VaristorCapacitorsComponent NameSymbolNon-polarized CapacitorPolarized CapacitorVariable CapacitorTrimmer CapacitorInductorsComponent NameSymbolAir Cored InductorIron Cored InductorTapped InductorTransformersComponent NameSymbolTransformerCenter Tapped TransformerStep up TransformerStep Down TransformerTransformer with two secondary windingsCurrent TransformerPotential TransformerZero Sequence Current Transformer (ZSCT)DiodesComponent NameSymbolPN Junction DiodeSchottky DiodeZener DiodeLight Emitting Diode (LED)Photo DiodeTunnel DiodeVaricap (Variable Capacitor Diode)Schockley DiodeConstant Current DiodeSilicon Controlled Rectifier (SCR)DiacTransistorsComponent NameSymbolN-channel, Junction ... Read More

An electrodynamometer or simply Dynamometer wattmeter is an instrument that is universally used for the measurement of DC as well as AC electric power.It works on the principle of dynamometer i.e. a mechanical force acts between two current carrying conductors.Construction of ElectrodynamometerThe electrodynamometer wattmeter has a fixed coil divided into two parts and is connected in series with the load and caries the load current (I1). The moving coil is connected across the load through a series multiplier resistance (R) and carries a current (I2) proportional to the load voltage. The fixed coil is called as Current Coil and the ... Read More