coulomb's law of electrostatic

 The examination of electromagnetic marvels that happen when there are no moving charges—i.e., after a static congruity has been set up. Charges show up at their equilibrium positions rapidly, considering the way that the electric force is exceptionally astounding. The mathematical strategies for electrostatics make it possible to calculate the allocations of the electric field and of the electric potential from a known arrangement of charges, transmitters, and covers. On the other hand, given a lot of transports with known potential outcomes, it is practical to find out electric fields in regions between the transmitters and to choose the charge appointment outwardly of the courses. The electric energy of a lot of charges extremely still can be seen from the viewpoint of 

Force (f)=k q1×q2÷r×r ×r Cape

In the example, the chargein the electric field produced by the charge Q2. This field has the valueEquation.in newtons per coulomb (N/C). (An electric field can also be expressed in volts per metre [V/m], which is the equivalent of newtons per coulomb.) The electric force on Q1 is given byEquation.in newtons. This equation can be used to define the electric field of a point charge. The electric field E produced by charge Q2 is a vector. The magnitude of the field varies inversely as the square of the distance from Q2; its direction is away from Q2 when Q2 is a positive charge and toward Q2 when Q2 is a negative charge. Using equations (2) and (4), Electricity and Magnetism. Electricity. Electrostatics. Static electricity. [Calculating the value of an electric field - equation 4]

Electrostatic

Electro static the investigation of electromagnetic wonders that happen when there are no moving charges—i.e., after a static harmony has been set up. Charges arrive at their balance positions quickly, in light of the fact that the electric power is very amazing. The numerical techniques for electrostatics make it conceivable to figure the appropriations of the electric field and of the electric potential from a known setup of charges, transmitters, and covers. Then again, given a bunch of conveyors with known possibilities, it is feasible to ascertain electric fields in districts between the transmitters and to decide the charge appropriation on the outside of the conduits. The electric energy of a bunch of charges very still can be seen from the outlook of the work needed to gather the charges; then again, the energy additionally can be considered to live in the electric field delivered by this get together of charges. At last, energy can be put away in a capacitor; the energy needed to charge such a gadget is put away in it as electrostatic energy of the electric field.

What is electronic gadgets

Electronic device

Gadgets involves the material science, designing, innovation and applications that arrangement with the outflow, stream and control of electrons in vacuum and matter.[1] It utilizes dynamic gadgets to control electron stream by enhancement and correction, which recognizes it from old style electrical designing which utilizes aloof impacts like opposition, capacitance and inductance to control flow stream.

Gadgets has majorly affected the improvement of present day culture. The recognizable proof of the electron in 1897, alongside the resulting creation of the vacuum tube which could intensify and redress little electrical signs, introduced the field of gadgets and the electron age.[2] This qualification began around 1906 with the development by Lee De Forest of the triode, which made electrical intensification of powerless radio signs and sound signs conceivable with a non-mechanical gadget. Until 1950, this field was classified "radio innovation" since its important application was the plan and hypothesis of radio transmitters, collectors, and vacuum tubes. 

The expression "strong state gadgets" arose after the principal working semiconductor was developed by William Shockley, Walter Houser Brattain and John Bardeen at Bell Labs in 1947. The MOSFET (MOS semiconductor) was subsequently concocted by Mohamed Atalla and Dawon Kahng at Bell Labs in 1959. The MOSFET was the principal really smaller semiconductor that could be scaled down and mass-delivered for a wide scope of employments, altering the gadgets business, and assuming a focal part in the microelectronics unrest and Digital Revolution. The MOSFET has since turned into the essential component in most current electronic hardware, and is the most broadly utilized electronic gadget on the planet.

Gadgets is broadly utilized in data handling, telecom, and sign preparing. The capacity of electronic gadgets to go about as switches makes computerized data handling conceivable. Interconnection innovations, for example, circuit sheets, hardware bundling innovation, and other differed types of correspondence framework complete circuit usefulness and change the blended electronic parts into a normal working framework, called an electronic framework; models are PCs or control frameworks. An electronic framework might be a part of one more designed framework or an independent gadget.

Community college of disadvantages

 

College

While there are many distinct advantages that can be associated with attending a community college there are a few disadvantages that I would be remiss in not mentioned . We all like to look at the positive side of things and the good in my opinion of community colleges, at least as a springboard for university learning far outweigh the bad.  I

f you are considering community college as an option whether for your associate’s degree alone or have plans to move along to the university level upon completion you should see the big image and not just the sunshine and flowers.

The first thing you should be aware of, and this applies primarily to those students with plans to send, is that you should always consult the college you intend to attend next in order to make sure that the courses you are taking on the community college level are compatible with the core requirements for the university. In many cases they are similar enough to be considered compatible but there are exceptions and it is better to find this out sooner rather than later. If you plan to attend a University that is located near the community college you are attending you should check and see if they have some sort of articulation agreement that will allow associate’s degree graduates to transfer seamlessly.

Many states are stepping in and passing laws that require colleges in their specific states to accept community college credits as transfer credits in an effort to keep qualified workers in the state. Some universities are even offering distance learning programs to associates degree graduates in order to allow access to students who live a greater distance from campus to have access to educational opportunities that would have been denied to them in the past. Of course if you live in one of these states, a former disadvantage may now work in your favor.

Many community colleges do not offer housing opportunities and most of those that do are still largely commuter campuses rather than residence campuses. Rather than spending funds on housing these colleges tend to reserve their spending to assist in academic pursuits. Community colleges in rural areas are much more likely than those in larger cities to offer housing on campus. The lack of on-campus housing makes participation in sports and other activities a little more difficult than colleges that are largely residential in nature.

If you decide to make a community college your last stop when it comes to your personal educational experience you will be denying yourself a great deal of earning potential over the course of your lifetime. For this reason you should seriously consider the benefits that transferring to a university will present for your educational goals.

My largest complaint when it comes to community colleges when compared to larger universities was the fact that there are such limited opportunities to take specific classes than when compared to those classes on a university level. You will find that you must remain within your sequence of courses on the community college level or you risk needing an extra semester or year in order to complete the requirements for your associate’s degree. Universities tend to offer greater flexibility, especially in lower level courses that are required by all in order to graduate.

My other major complaint when it comes to community college is the fact that they often have much smaller libraries than universities. This seriously limits the ability that students have to do extensive research with the exception of rare cases. Universities simply have deeper pockets than the average community college. For this reason they will have bigger libraries and far more bells and whistles than the average community college. Hopefully we’ll see this change over time as well. Despite the disadvantages that can be associated with community college educations, I feel that they are very much outweighed by the benefits that the community college learning environment offers.

what is Gravitation.

 Newton's law of gravitation

Force of gravitation between two bodies is directly proportional to the product of their masses and invesely proportional to squre of the distance between them. The expression for gravitation force is 

F=GM1M2÷r×r

M1,M2 are masses of the object

r is the distance between them

G is the universal constant

G=6.67×10'°-8

Gravity

Force of gravity on any body on the surface of earth is,

F=GMm÷R×R

Where M=mass of earth

m=mass of the body

R=radieas of earth 🌎

Acceleration due to gravity is g=GM÷R×R

Weight of the body=mg

Acceleration due to gravity of a body doesn't depend upon its mass.

Value of g on moon 🌒 is about 1/6th of that on earth and value of g on Sun 🌞 is about 27 times that on earth 🌎.

g is maximum on Jupiter and minimum of Mercury.

The true value of two years collage

 College

Higher education in this country is rapidly becoming a necessity in the business community rather than a luxury. There was a time when those who had a high school education still had the opportunity to build a better world for themselves and their families. Those days are rapidly becoming another dieing ember of the past. If you hope to have significant earning potential during your lifetime you are almost completely limited by your learning potential and the level of education you have received.

The good news is that you do not have to have an all or nothing approach when it comes to education. You can begin by taking baby steps when it comes to higher education. If you have a community college in your area, this is one of the greatest resources for beginning your college education at any stage in your life. Most community colleges offer classes at various times during the day and evening, even some on Saturday in order to accommodate students of

different ages and backgrounds.

Community colleges also offer an excellent opportunity to begin your learning quest in a manner that is much more easily affordable to the average citizen than a full-blown university. These colleges are largely commuter colleges though there are several that allow students the experience of living on a college campus at a much lower price than most major universities charge for the same or very similar privileges.

Community colleges also allow you to explore your options if you aren’t really sure what direction you wish for your education to take without paying such a high price for the process. If you know the career path you wish to take you might find a two-year degree program that can have you out of school and in a career much sooner than a four-year program will allow. If that isn’t good enough news for you, many of the two-year programs of study that are offered at the community college level may very well transfer quite easily into bachelor degree programs at the university level.

Community colleges offer an excellent start for many people who are seeking higher education whether to further their careers or just to find fulfillment on a personal level in life. There are many wonderful programs in vocational fields as well as academic fields that can be explored and studies on the community college level.

For graduating high school students community colleges help students ease into the adjustment from high school to college without going through the culture shock that some universities can put students through. You will find that there are often many opportunities to meet educational as well as social needs on the community college level for students that are interested in pursuing a community college education.

You should also discover that community colleges are much easier to budget when it comes to setting aside funds and savings for either your personal college education or the educational expenses of your children. Having them attend a community college for two years then transferring to a University can save a great deal of money and provide you a little piece of mind that your children are still receiving an excellent level of education.

Seriously, if you are looking for an excellent value when it comes to education you would be doing yourself or your children a disservice if you do not check out the community college options in your area before taking the plunge and diving into the university lifestyle. You will find that community colleges often offer an equal level of education for the introductory classes that first and second year college students often take, they are a much better value for the money, and they are an outstanding values for those who are trying to juggle their education with family and work responsibilities.

इस देश में उच्च शिक्षा एक विलासिता के बजाय व्यवसायिक समुदाय में तेजी से एक आवश्यकता बनती जा रही है।  एक समय था जब हाई स्कूल की शिक्षा प्राप्त करने वालों के पास अभी भी अपने और अपने परिवार के लिए एक बेहतर दुनिया बनाने का अवसर था।  वे दिन तेजी से अतीत के एक और मरते हुए अंगारे बनते जा रहे हैं।  यदि आप अपने जीवनकाल में महत्वपूर्ण कमाई की संभावना की उम्मीद करते हैं तो आप अपनी सीखने की क्षमता और आपको प्राप्त शिक्षा के स्तर से लगभग पूरी तरह से सीमित हैं।

 अच्छी खबर यह है कि जब शिक्षा की बात आती है तो आपको सभी या कुछ भी नहीं दृष्टिकोण रखने की आवश्यकता नहीं होती है।  जब उच्च शिक्षा की बात आती है तो आप कदम उठाकर शुरुआत कर सकते हैं।  यदि आपके क्षेत्र में एक सामुदायिक कॉलेज है, तो यह आपके जीवन के किसी भी चरण में आपकी कॉलेज शिक्षा शुरू करने के लिए सबसे बड़े संसाधनों में से एक है।  अधिकांश सामुदायिक कॉलेज दिन और शाम के दौरान कई बार कक्षाएं प्रदान करते हैं, यहां तक ​​कि कुछ शनिवार को भी छात्रों को समायोजित करने के लिए

 मैं

 अलग-अलग उम्र और पृष्ठभूमि।

 सामुदायिक कॉलेज भी आपकी सीखने की खोज को इस तरह से शुरू करने का एक उत्कृष्ट अवसर प्रदान करते हैं जो एक पूर्ण विकसित विश्वविद्यालय की तुलना में औसत नागरिक के लिए अधिक आसानी से सस्ती है।  ये कॉलेज बड़े पैमाने पर कम्यूटर कॉलेज हैं, हालांकि कई ऐसे हैं जो छात्रों को कॉलेज परिसर में रहने का अनुभव बहुत कम कीमत पर देते हैं, जो कि अधिकांश प्रमुख विश्वविद्यालय समान या बहुत समान विशेषाधिकारों के लिए शुल्क लेते हैं।

 सामुदायिक कॉलेज आपको अपने विकल्पों का पता लगाने की अनुमति भी देते हैं यदि आप वास्तव में सुनिश्चित नहीं हैं कि प्रक्रिया के लिए इतनी अधिक कीमत चुकाए बिना आप अपनी शिक्षा को किस दिशा में ले जाना चाहते हैं।  यदि आप उस कैरियर पथ को जानते हैं जिसे आप लेना चाहते हैं तो आपको दो साल का डिग्री प्रोग्राम मिल सकता है जो आपको स्कूल से बाहर कर सकता है और करियर में चार साल के कार्यक्रम की तुलना में बहुत जल्द अनुमति देगा।  यदि यह आपके लिए पर्याप्त अच्छी खबर नहीं है, तो सामुदायिक कॉलेज स्तर पर पेश किए जाने वाले अध्ययन के दो वर्षीय कार्यक्रमों में से कई विश्वविद्यालय स्तर पर स्नातक डिग्री कार्यक्रमों में आसानी से स्थानांतरित हो सकते हैं।

 सामुदायिक कॉलेज कई लोगों के लिए एक उत्कृष्ट शुरुआत प्रदान करते हैं जो उच्च शिक्षा प्राप्त करना चाहते हैं चाहे अपने करियर को आगे बढ़ाना हो या जीवन में व्यक्तिगत स्तर पर पूर्णता प्राप्त करना हो।  व्यावसायिक क्षेत्रों के साथ-साथ अकादमिक क्षेत्रों में कई अद्भुत कार्यक्रम हैं जिन्हें खोजा जा सकता है और सामुदायिक कॉलेज स्तर पर अध्ययन किया जा सकता है।

 हाई स्कूल के छात्रों को स्नातक करने के लिए सामुदायिक कॉलेज छात्रों को हाई स्कूल से कॉलेज में समायोजन को आसान बनाने में मदद करते हैं, बिना संस्कृति के झटके से गुजरे जो कुछ विश्वविद्यालय छात्रों को डाल सकते हैं।  आप पाएंगे कि सामुदायिक कॉलेज स्तर पर उन छात्रों के लिए शैक्षिक और सामाजिक आवश्यकताओं को पूरा करने के लिए अक्सर कई अवसर होते हैं जो सामुदायिक कॉलेज शिक्षा को आगे बढ़ाने में रुचि रखते हैं।

 आपको यह भी पता होना चाहिए कि जब आपकी व्यक्तिगत कॉलेज शिक्षा या आपके बच्चों के शैक्षिक खर्चों के लिए धन और बचत को अलग करने की बात आती है तो सामुदायिक कॉलेजों का बजट बनाना बहुत आसान होता है।  उनके दो साल के लिए सामुदायिक कॉलेज में भाग लेने के बाद एक विश्वविद्यालय में स्थानांतरण से बहुत अधिक धन की बचत हो सकती है और आपको एक छोटा सा दिमाग मिल सकता है कि आपके बच्चे अभी भी एक उत्कृष्ट स्तर की शिक्षा प्राप्त कर रहे हैं।

 गंभीरता से, यदि आप शिक्षा के मामले में एक उत्कृष्ट मूल्य की तलाश कर रहे हैं, तो आप अपने या अपने बच्चों के लिए एक नुकसान कर रहे होंगे यदि आप कॉलेज की जीवन शैली में डुबकी लगाने और गोता लगाने से पहले अपने क्षेत्र में सामुदायिक कॉलेज के विकल्पों की जाँच नहीं करते हैं।  आप पाएंगे कि सामुदायिक कॉलेज अक्सर प्रारंभिक कक्षाओं के लिए समान स्तर की शिक्षा प्रदान करते हैं जो पहले और दूसरे वर्ष के कॉलेज के छात्र अक्सर लेते हैं, वे पैसे के लिए बहुत बेहतर मूल्य हैं, और वे उन लोगों के लिए एक उत्कृष्ट मूल्य हैं जो हथकंडा करने की कोशिश कर रहे हैं  परिवार और काम की जिम्मेदारियों के साथ उनकी शिक्षा।

The Invention of Television

 Television

The transmission of photo  obsessed inventors as early as 1875 when George Carey of Boston proposed his cumbersome system. Only five years later, the principle of scanning a photo, line by line and frame by frame – still used in modern television sets – was proposed simultaneously in the USA (by W.E. Sawyer) and in France (by Maurice Leblanc). The first complete television  using the newly discovered properties of selenium – was patented in Germany in 1884, by Paul Nipkow. Boris Rosing of Russia actually transmitted images in 1907. The idea to incorporated cathode -ray tubes was proposed in 1911 by a Scottish engineer, Campbell Swinton. Another Scot, John Logie Baird, beat American inventor C.F. Jenkins to the mark by giving the first public demonstration of – a dim and badly flickering – television in 1926 in Soho, London. Britain commenced experimental broadcasting almost immediately thereafter. Irish actress Peggy O’Neil was the first to be interviewed on TV in April 1930. The Japanese televised an elementary school baseball match in September 1931. Nazi Germany started its own broadcasting service in 1935 and offered coverage of the 1936 Olympics. By November 1936, the BBC was broadcasting daily from Alexandra Palace in London to all of 100 TV sets in the kingdom. At the beginning there were many competing standards on both sides of the Atlantic. Baird’s technological solutions were trounced by Isaac Shoenberg and his team, set up in 1931 by Electric and Musical Industries . RCA refined its own system, as did the Dutch Philips. Not until 1951 were the standards for public broadcasting set in the USA and in Europe. But the Americans were the ones to grasp the commercial implications of television. Bulova Clock paid $9 to WNBT of New York for the first 20-seconds TV spot, broadcast during a game between the Brooklyn Dodgers and the Philadelphia Phillies in July 1941. Soap operas followed in February 1947 (DuMont TV’s A Woman to Remember) and the first TV news helicopter was launched by KTLA Channel 5 in Los Angeles on 4 July 1958. The first patent for color television was issued in Germany in 1904. Vladimir Kosma Zworykin, the Russia-born American innovator, came up with a complete color system in 1925. Baird himself demonstrated color TV transmission in 1928. Various researchers at Bell Laboratories perfected color television in the late 1920s. Georges Valenso of France patented a series of breakthrough technologies in 1938. But color TV became widespread only in the 1960.

Or gate and And gate.

 Or gate working

A=0,B=0 Both D1 and D2 don't conduct. Hence output y=0

A=0,B=0, D1 conducts D2 does not conduct.hence output y=1.

A=1,B=0  D1 conducts,D2 does not conduct. Hence output y=1 .

A=1,B=1, Both  D1 and D2 conduct.

Hence output y=1.

AND gate

It is realised by using two junction diode.

It has two or more inputs but one output.

It is expressed as y=A AND B=A.B (reads as y equals A AND B).

Conclusion

It all input are 1 them output is 1.

Working

If A=0,B=0, Both D1 and D2 are Forward biased and conduct.since both diodes are short circuited, output y=0.

If A=0,B=1,D1 is Forward blased but short circuited. 

Hence output y=0.

If A=1,B=0,D1 does not conduct. D2 is Forward biased but short circuited . Hence output y=0.