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Explain the significance of virtual ground in an operational amplifier?
Ans: Significance of Virtual Ground: Fig. (a) illustrates the circuit diagram of basic Inverting Amplifier. In this figure, the non-inverting terminal is grounded and input signal is applied to inverting terminal via resistor R1. However, difference input voltage is ideally zero: that is, voltage at the inverting terminal (v2) is approximately equal to that at non-inverting terminal (v1). Or we can say, inverting terminal voltage v2 is approximately at ground potential. Hence, inverting terminal is said to be at Virtual Ground. This notion is extremely useful in analysis of closed loop Op-amp circuits.
Briefly explain how the wavelength of monochromatic light is calculated using Newton's rings arrangement?
At certain sharply explained wavelengths, the power of X-rays is very large as marked K alpha, K beta .... As shown in figure. These X-rays are called as property of X-rays. At oth
Fermat's principle; principle of least time (P. de Fermat): The principle put by P. de Fermat, which states the path taken through a ray of light among any two points into a s
An a.c. voltage E = E 0 sin cot is applied across an inductor L. Get an expression for current I. Draw a labelled diagram of Van de Graff generator. Verify its principle of wor
project work
two bodies of masses 200 g and 300 g are tied to a string which is passed over a pully.if pully has no weight and friction,then find the accerlation of the bodies and tension in th
A board that is 1.5 m long is supported in two places. If the force exerted by the first support is 25 N and the forced exerted by the second is 62 N. what is the mass of t
It is the degree or extent by which magnetic lines of force can enter a substance and is expressed by µ.
Illustrate the characteristics of a sound note. What do you mean by Resonance? Illustrate with an example.
Magnetic poles: The two regions near the ends of a magnet at which the attracting forces appear to be concentrated are called the magnetic poles. The pole (when freely suspende
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