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Simpson and Scarce Theory

Simpson and Scarce Theory Simpson and Scarce theory is a model used to explain the mechanism of light emission in semiconductors. The theory was proposed by G. Simpson and N. Scarce in the 1960s. This theory is based on the temperature variations in the various regions of the cloud. a cloud is shown to be traveling from left to right along with the air currents. When these air currents collide with the water particles at the bottom of the cloud, the water drops are broken and carried upwards, unless they combine and remain in a small packet of positive charges. With the collision of water drops the air is negatively charged and water particles are positively charged. These negative charges in the air are at once absorbed by the cloud particles, which move upward with air currents.  Metrological and electrical conditions within a thundercloud. A positive charge resides in the upper portion of the cloud above a region of separation from the negative charge in which the temperature is bet

Reluctance Motor - principle, Working, Advantages

Reluctance Motor The stator has the main winding and an auxiliary (starting) winding. In general, the stator of a single-phase reluctance motor is similar to that of any one of the single-phase induction motors. The rotor of a reluctance motor is basically a squirrel cage with some rotor teeth removed at the appropriate places such as to provide the desired number of  salient rotor poles.  Figure 9.1 shows the 4- pole reluctance-type synchronous motor. Her teeth have been removed in four locations to produce a 4-pole salient-pole structure. The rotor bars are kept intact even in the spaces from where teeth are removed. The two end rings short-circuit these bars as in a cage rotor. Working principle Of Reluctance Motor When the stator is connected to a single-phase supply, the motor starts as a single-phase induction motor. At a speed, of about 75 percent of the synchronous speed, a centrifugal switch disconnects the auxiliary winding, and the motor continues  to speed up as a single-ph

What Is Gray Code and its Properties

What Is Gray Code Normally, some structure delivers steady yield data which is required to be changed over to mechanized data. It is changed over by using easy to modernized converter. On occasion, gray codes are used to address the mechanized data.  The gray codes are generally called unit isolate code or minimum change code in light of the way that each succeeding code changes just by 1 bit from the primary code. The gray code can be addressed by the purchases in G. Properties of Gray Codes 1. It is a unit isolate code. For example, gray codes 4 and 5 are 0110 and 0111 independently. We can see there is the distinction is only a solitary piece i.e. in LSB, the remaining bits are the same, it is known as the slightest change code. 2. It is a non-weighted code in light of the fact that these are not positionally weighted. It suggests each situation of code isn't doled out in a settled regard. 3. It isn't a self-supplementing code.

BPSC Prelims Result out - Check Here

BPSC Prelims Result out - Check Here Bihar Public Service Commission (BPSC) may declare the result of the BPSC 64th PCS Prelims Exam on its official site, bpsc.bih.nic. BPSC just discharged the Bihar Civil PCS Prelims Answer Key in December, on the official site. Hopefuls who had shown up in the BPSC test can check their result, once discharged, on the official site of BPSC BPSC Civil Services Prelims: Steps to check result Go to the official site of BPSC - On Home Page, you will get the 64th BPSC Prelims Result in the most recent updates to date savvy Another window will open appearing on occasions Enter the required qualifications and tap on submit catch Hopefuls can download and take a printout of the result for sometime later BPSC Civil Service Main Exam Admit Card  Bihar Civil Service Main Exam concede card is relied upon to discharge in the long stretch of February or March. BPSC Prelims Result 2018: 5 lakh hopefuls showed up for a test BP

Hydroelectric Power - Definition, Dam, Construction, Operation, Advantage

Hydroelectric Power - Definition, Dam, Construction, Operation, Advantage Hydroelectric Power Definition Hydroelectricity is the term alluding to electricity created by hydropower; the generation of electrical power using the gravitational power of falling or streaming water. In 2015 hydropower created 16.6% of the universe all out electricity and 70% of all inexhaustible electricity, and is required to increment about 3.1% every year for the following 25 years.  Hydropower is delivered in 150 nations, with the Asia-Pacific district creating 33 percent of worldwide hydropower in 2013. China is the biggest hydroelectricity maker, with 920 TWh of creation in 2013, speaking to 16.9 percent of local electricity use. The expense of hydroelectricity is moderately low, making it a focused wellspring of sustainable electricity. The hydro station expends no water, dissimilar to coal or gas plants. The normal expense of electricity from a hydro station bigger than 10 megawatts is 3 to 5 U.S. pen

Superposition Theorem

Superposition Theorem  The superposition theorem depends on the idea of linearity between the reaction and excitation of an electrical circuit. It expresses that the reaction in a specific branch of a direct circuit when different free sources are acting in the meantime is equal to the entirety of the reactions because of every autonomous source acting at once.  In this strategy, we will consider just a single autonomous source at any given moment. In this way, we need to wipe out the staying free sources from the circuit. We can take out the voltage sources by shorting their two terminals and also, the present sources by opening their two terminals.  Statement of Superposition Theorem The Superposition Theorem states that for any linear system, the response (output) caused by any combination of input signals is the same as the sum of the individual responses caused by each input signal acting alone. In mathematical terms, the Superposition Theorem states that for a linear system with

Hard Disk Definition, Function, Work

Hard Disk Definition, Function, Work The 1950s saw the development of hard drives. They first appeared as huge discs with a 20-inch circumference that could only store a few megabytes. Initially known as "fixed discs" or "Winchesters" (a code name used for a popular IBM product). To distinguish them from "floppy discs," they later adopted the name "hard discs." Instead of the flexible plastic film seen in tapes and floppies, the magnetic media is stored on a hard platter in hard discs. Definition of Hard disk A fixed disc or hard drive are other names for a hard disc. It is said to be a data-storing rigid magnetic disc. It can be found inside a drive unit. A hard disc is a non-volatile storage device that has magnetic discs and platters that spin quickly. Non-volatile data is data that survives the shutdown of the computer. Internally, our computer systems have it installed. The hard disc, which is made up of one or more platters packed in an air