Quantum Mechanics Answers

A particle is placed inside a one
dimensional box with rigid walls. The first
excited state energy of the particle is
4 eV. The ground state energy is
Answer 1eV

Spin angular momentum of an electron
1) always is same h/2π
2) integral multiple of h/2π

At temperature T Kelvin (K), the value of the Fermi function at an energy 0.5 eV above the Fermi energy is 0.01. Then T, to the nearest integer, is_____________
(

What is the value of wave funct at the surface of an infinite potential is
1)0
2) infinite
3)1

The orbital angular momentum of a single 2s electron is (h is the
Planck’s constant) :
(A) h/2
(B) h/4
(C) h√ 2 / 2
(D) Zero

A particle is placed inside a one
dimensional box with rigid walls. The first
excited state energy of the particle is
4 eV. The ground state energy is
(A) 2 eV (B) 3 eV
(C) 1 eV (D) 0 eV

A modulator circuit contains carrier frequency generator but the demodulator does
not require it. Explain by taking any one example.

Describe the 5 common sources of noise in communication system and explain the ways
to reduce each of them.

A linear Hermitian operator A has infinite number of eigen values ai and has a complete set of orthonormal eigen state |ai> . If the system is in a state |ψ> = |a1> +i/2 |a2> the probability of getting a value a2 for A on measurement is
Answer:0.2

a particle in cubic shaped box with infinitely hard walls whose edges are a,b&c respectively one corner of cube at origin and edges parallel to the axes the wave function of particle?