Recent content by Maharshi Roy

In control theory, we have the proportional controller which is of the form- u(t) = ke where e is the error between the current measured value and the required value. The P controller is said to droop. To avoid this, an integral...

For particle in a box, we have a specific wavenumber = n*(pi)/L. This corresponds to a momentum. Actually, what is this momentum? It is not of course the average momentum of all the contributing sinusoids (fourier transform components), because the expectation value of momentum in the particle...

By solving the Schrödinger equation, we get atmost two solutions for wavefunctions with definite wavenumber and definite wavelength. Thus, we know specifically the momentum of the particle. But this is contradicted by HUP. Please explain. I would appreciate an explanation in the context of a...

For a particle in a box, we have been explained that the wave function is like a standing wave. Then we wrote:- λ = 2L/n where λ is the wavelength of the nth energy state. But a moving particle is considered as a wave packet and so does not have an unique wavelength. Then, how are we determining...

In Griffith quantum mechanics, it is written that for a wavefunction to be normalizable, it is essential that the wavefunction approaches zero before 1/ √(|x|) as x tends to infinity... Please explain from where this condition has been derived.

First of all, the physical significance of divergence is not just spreading out. Refer the following pictures:-...

From the output characteristics of a BJT, it is observable that in the active region, the collector current becomes constant or independent of collector emitter voltage. So, in true terms, it is saturation, then why do we call it the active region? Also, we have the equation:- Ic = (Vcc –...

But I wnat to ask that why it gets clipped? The inner mechanism,,,we obviously don't have a clipper set there...

I need to understand how does an amplified signal gets clipped depending upon the biasing voltage level? It says that upon insufficient biasing, the output voltage becomes constant, but how? Please if you attach this link:- http://www.electronics-tutorials.ws/amplifier/amp_4.html I mention you...

It is probably an axiom or prostulate by Faraday. There is no theoretical deep understanding of the reason. If you can deal with a bit of maths, then the proof is as:- http://en.wikipedia.org/wiki/Faraday%27s_law_of_induction#Proof_of_Faraday.27s_law

Ans: final velocity= v(initial) + g(Wa-2μWb)/(4Wb+Wa)t

I require a plenty set of questions on Circuit analysis for electrical engineering. Please suggest some source or book.

Yes, actually interference is a phase independent phenomena. If you have read YDSE, then you must know of the equation:- Intensity(central maxima)=4Icos^2(δ/2) where, δ and I are phase difference b/w the slits and intensity of the slit respectively. Now, for incoherent sources, δ varies...

In field theory, it has been described that the particle of electromagnetic field is a photon. Although photons are massless particles, but they can have relativistic mass when they approach the speed of light. So, in this sense there might be some relationship between magnetism and mass.

It depends upon the problem. Please provide an example so that I can explain it better. However refer below for a little help:- Q.1) Find the rate of change of ideal gas pressure with respect to volume? Soln: P=nRT/V We require rate of change of pressure only with respect to volume, hence...