Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

What are the Fresnel Equations?Fresnel Equations DefinitionFresnel Equations describe the ratios of electric fields of reflected and transmitted waves to the incident wave.Light Reflection and TransmissionThese equations explain how light reflects and transmits at the boundary between two different mediums.Polarization type S-Polarization P-PolarizationHistorical InsightAugustin-Jean Fresnel developed these equations, understanding light as a transverse wave.PolarizationsLight polarization can b

What is Stroboscopic Motion?Stroboscopic Motion DefinitionStroboscopic motion is defined as a visual phenomenon where continuous rotational motion appears as separate short samples close to the motion’s period.Strobe Light EffectThe strobe light effect occurs when a moving object is illuminated by a fluctuating light source, causing it to appear as if it’s moving differently than it is.Examples of Stroboscopic MotionA car wheel appears to move backward in a film due to stroboscopic motion.Safety

What is Photometry?Photometry DefinitionPhotometry is defined as the science of measuring light in terms of its perceived brightness to the human eye.Fiber PhotometryFiber photometry uses optical fibers and fluorescent indicators to record neural activity in living animals.Flame PhotometryFlame photometry determines the concentration of metal ions in a sample by measuring emitted light from a flame.Reflectance PhotometryReflectance photometry measures the color and reflectance properties of surf

How Dose a Lead Acid Battery Work?Lead Acid Battery DefinedA lead acid battery is defined as a rechargeable storage device where electrical energy is transformed into chemical energy during charging, and vice versa during discharging.Materials and CompositionEssential materials include lead peroxide and sponge lead, used in the positive and negative plates respectively, submerged in dilute sulfuric acid.Working of Lead Acid BatteryThe battery operates by converting stored chemical energy into el

What is the Ionization Process?Ionization DefinitionIonization is a fundamental concept in chemistry and physics that describes the transformation of electrically neutral atoms or molecules into electrically charged ones.Ionization ProcessThe ionization process involves the transfer of electrons between atoms or molecules.Sodium Chloride ExampleBoth Na and Cl atoms are unstable or chemically active. When they come close to each other, they undergo a chemical reaction that involves the exchange o

How Dose a Battery Work?Battery Working Principle DefinitionA battery works by converting chemical energy into electrical energy through the oxidation and reduction reactions of an electrolyte with metals.Electrodes and ElectrolyteThe battery uses two dissimilar metals (electrodes) and an electrolyte to create a potential difference, with the cathode being the negative terminal and the anode the positive terminal.Electron AffinityElectron affinity determines which metal in the electrolyte will g

What are Alkaline Battery?Alkaline Battery DefinitionAn alkaline battery is defined as a type of battery that uses zinc and manganese dioxide as electrodes and potassium hydroxide as the electrolyte.Working PrincipleAlkaline batteries work based on the reaction between zinc (Zn) and manganese dioxide (MnO2), facilitated by the potassium hydroxide electrolyte.ConstructionThe construction of an alkaline battery involves a steel drum cathode, zinc powder anode, manganese dioxide cathode mixture, a

How to Discharge a Bettery ?Charging and Discharging DefinitionCharging is the process of restoring a battery’s energy by reversing the discharge reactions, while discharging is the release of stored energy through chemical reactions.Oxidation ReactionOxidation happens at the anode, where the material loses electrons.Reduction ReactionReduction happens at the cathode, where the material gains electrons.Discharging of BatteryIn a battery there are two electrodes immersed in an electrolyte. When a

What is a Daniell Cell ?Daniell Cell DefinitionA Daniell Cell is defined as an improved version of the Voltaic Cell that prevents polarization by converting chemical energy into electrical energy.Construction of Daniell CellThe cell consists of a copper container with copper sulfate solution and a porous pot filled with diluted sulfuric acid containing a zinc rod.Oxidation and ReductionOxidation occurs at the zinc rod (cathode), forming zinc sulfate, while reduction occurs at the copper containe

Battery DefinitionA battery is defined as a device that stores and provides electrical energy through chemical reactions, classified into primary and secondary types.Types of Battery Primary Batteries Secondary BatteriesPrimary BatteriesPrimary batteries, such as zinc-carbon and alkaline, are non-rechargeable and used in devices like clocks and remote controls.Secondary BatteriesSecondary batteries, like lithium-ion and lead-acid, are rechargeable and used in devices like mobile phones and elect