bkacademy blog for Physicsplus
the questions goes like this
Two coherent plane electromagnetic waves of wavelength 0.5 micrometre ( both have the same amplitude and are linearly polarized along the Z direction) fall on the y = 0 plane their vector K1 and K2 are as shown in the figure. if the angle theta is 30 degree the fringe spacing of the interference pattern produced on the plane is ….
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the questions goes like this
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Standard integral problem
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the two problems solved here goes something like this.
In the following circuit each device D may be an insulator with probability p or a conductor with probability 1 – p.
The probability that a non zero current flows through the circuit is
The second problem goes like this:
The solution of the differential equation
with boundary condition y(x=1)=0 is
The Slides can be found here
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Question goes like this:
The Infinite square well potential of a particle in a box of size a is modified as shown in the figure below. The energy of the ground state compared to the ground state energy before the perturbation was added
The second problem goes something like this
A Quantum particle of mass M in One dimension confined to a rigid box as shown in the figure is in its ground state. And infinitesimally thin wall is very well slowly raised to infinity at the centre of the box in such a way that the system remains in its ground state at all times as you mean that no energy is lost in raising the wall the work done on the system when the wall is fully taste eventually separating the original box into two Compartment
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The question goes something like this :
A particle of mass M moves in One dimension in the potential V(x) equal to Kx^4 at time T equal to zero the particle starts from rest at x equal to A for bounded motion the time period of the motion is
Video solution is here:
The Slides can be found here
The problem goes like this:
The problem goes something like this:
Assume that the Earth revolves in a circular orbit around the sun suppose the gravitational constant G very slowly as a function of time in particular it decreases to half its initial value in the course of 1 million years then during this time :
a)Radius of the earth’s Orbit will increase by a factor of 2
b) Total energy of the earth remains constant
c) orbital angular momentum of the earth will increase
d) radius of the earth’s Orbit remains the same.
here a solution to this problem:
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Here’s a Quick note on Hermite Polynomial and Hermite Functions. This is pretty much what you will need for your competitive exams and interviews.
The video solution is presented below:
The PDF solution is linked here:
https://drive.google.com/file/d/1il55xwOSCoo1fNlHZ_3DAk5sz7zIf_uw/view?usp=sharing
Physics Plus by bkacademy.in