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Question Bank Principle of an optical fiber (total internal reflection)  1. Explain briefly 'basic principle of an optical fiber'. Ans. Optical fibres works on the principle of total internal reflection. When light ray strikes at the internal surface of optical fibre cable called such that incidence angle is greater than critical angle, then incident light ray reflects in the same medium and this phenomenon repeats. or Explain the principle of total internal reflection. Ans. Total internal reflection: When a light ray travels from denser medium to rarer medium, the angle of incidence is greater than critical angle then it reflects into the same medium. This phenomenon is called total internal reflection. Acceptance angle and Numerical aperture 2. Explain the terms numerical aperture and acceptance angle. Ans.The numerical aperture is determined by the core and cladding. The acceptance angle is determined by core, cladding, and the outside. The greater the difference in the inde

     Engineering Mathematics-1 Solved Papers SYLLABUS(2019) Engineering Mathematics-1 Calculus : 1. Improper integrals ( Beta and Gamma Functions ) and their properties;  2. Applications of definite integrals to evaluate surface area and volumes of revolutions. Sequences and Series : 1. Convergence of sequence and series;  2. Tests for convergence;  3. Power series,  4. Taylor's series,  5. Series for exponential,  6. Trigonometric and Logarithm Functions. Fourier Series : 1. Periodic functions,  2. Fourier Series,  3. Euler's formula,  4. Change of intervals,  5. Half Range Sine and Cosine series,  6. Parseval's Theorem. Multivariable  Calculus ( Differentiation ) : 1. Limit, Continuity and Partial derivatives,  2. Directional derivatives,  3. Total derivatives,  4. Tangent plane and normal line,  5. Maxima, Minima and Saddle points,  6. Method of Lagrange Multipliers,  7. Gradient,  8. Curl and Divergence. Multivariable Calculus ( Integration ) :  Multiple Integration : 1

what is the main component of an electronic device?  Transistor is the main component of all devices and circuits.This is by semiconductor and work as a switching in your device or circuit. All the circuits are not possible to make without transistor. The above image shows D882 Transistor this transistor is very common to use and very low price in local market this Transistor price is only 5 Rs this is very chip price. By using this Transistor you can make a simple inverter at your home. Simple inverter Circuit diagram So you can see the above diagram is present a simple circuit connections that's show how to make inverter :- Components: 1. D882/BD140 transistor. 2. 220 ohm resistance. 3. 1K resistance. 4. 100uf capacitor. 5. Mobile Charger Transformer. 6. 3v battery. 7. Bulb Holder. 8. Connecting wires. For making this circuit you can also use BD140 Transistor  BD140 Transistor is best for this circuit and give more out put. This Transistor price in local market is 10 Rs so this i

  What is Digital farming? How do farmers usually do farming? As we all know that farming is very difficult for the farmer. And they cultivate with great difficulty. Farmers usually use plows and tractors to do farming and continue to cultivate in the sun throughout the day. They have to face a lot of problems by doing farming in this way. And he also invest a lot of his money but he does not get much benefit. And in this way they use a lot of water and also use medicines so that their crops do not get worms. And this also increase their expenses a lot. And those who are lower class farmers have to face a lot of problems. They also have to face many diseases caused by sunlight. What kind of loss dose the farmers suffer from such farming? If the sun becomes too much in summer, their crop gets spoiled. Their crop dries up, ruining all their hard work. But there are many crops which get spoiled due to less sunlight. This causes a lot of hardship to the farmers. Sometimes, excessive rainfa