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Probability of finding a particle between 0 to 0.5L in a onedimensional box of length L in the second excited state is :
The correct answer is: 1/2
For the case of even parity solution of a symmetric infinite potential well, what is true for expectation value of x, p, x^{2} and p^{2} ?
Correct Answer : d
Explanation : φ = A cos nπx/L
x = φxφ dx
= A^{2} ∫(0 to L) xcos^{2} nπx/L dx
= A^{2} ∫(0 to L) x/2(cos^{2 }nπx/L  1) dx
= (A^{2})/2 ∫(0 to L) xcos^{2} nπx/L dx
= 0
p = d/dt (x)
= 0
Which of the following can be a wave function?
Out of all the given options, sin x is the only function, that is continuous and singlevalued. All the rest of the functions are either discontinuous or doublevalued.
Consider the case of an infinite square well potential symmetric about the y axis i.e.
Which of the following is a true?
The correct answer is: Infinite square well which is not symmetric about the y axis, has only odd parity states, whereas the asymmetric potential well has both even & odd parity states
The solution to the Schrodinger equation for a particle bound in a onedimensional, infinitely deep potential well, indexed by a quantum number n, indicates that in the middle of the well, the probability density vanishes for.
For particle in a box
For ψ_{1}(x), probability density does not vanish in the middle
for
probability density vanishes in the middle
Similarly, it does not vanish for vanishes for in the middle of the well.
The correct answer is: states of even n(n = 2, 4...)
For a particle of mass m, being acted upon by a force with potential energy function a onedimensional simple harmonic oscillator. If there is a wall at x = 0 so that V = ∞ for x < 0, then the energy levels are equal to :
The probability distributions for the quantum states of the oscillator without the barrier.
Infinite barrier at the origin means a node at origin, or the wave function goes to zero at x = 0.
By symmetry, the ground state will disappear, as well all the even states. Odd values remain
For a quantum wave particle, E = _____________
The Energy of a wave particle is given as ℏ ω while the momentum of the particle is given as ℏ k. These are the desired relation.
Consider the potential of the form
V(x) = 0 for x < a
= V_{0} for a < x b
= 0 for x > b
Which of the following wave functions is possible for a particle incident from the left with energy E < V_{0}
Solving the Schrodinger equation for the region from a to b.
So, in the region from x = a to b, the wave function are in the form of exponential rise/fall.
An electron is trapped in an infinite well of width 1cm. For what value of n will the electron have an energy of 2eV?
The correct answer is: ~ 10^{7}
If the nucleus is seen as a cubical box of length 10^{–14} m, then compute the minimum energy of a nucleon confined to the nucleus. Mass of nucleon = 1.6 × 10^{–27} kg
The correct answer is: 6 MeV
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