We SHALL Quiz1
1. The eigen values of the matrix (3 1
2 2) are
1 and 4
3 and 2
1 and 2
3 and 0
2. The length of a spaceship is measured to be exactly half of its proper length. The speed of the spaceship is
�2/3 c
�5/2 c
2/3 c
�3 /2 c
3. Differential form of Gauss’s law is
�.E = 𝝆/𝞮0
�X E =𝝆/𝞮0
�E =𝝆/𝞮0
�.E = 𝝆/𝞮
4. The de Broglie wavelength of an electron of kinetic energy E(in eV) is proportional to
E
E 1/2
E -1
E -1/2
5. The principle behind light propagation through optical fibre is
Refraction
Dispersion
Reflection
Total internal reflection
6. The term symbol for a particular atomic state is quoted as 4 P 5/2 the values of L,S and J are
L=1,S=3/2, J= 5/2
L=1, S=1/2,J = 1/2
L= 2,S=1/2, J= 5/2
L=2,S=1/2, J=3/2
7. Bravais lattice of CsCl is
Simple cubic
BCC
FCC
BASE CENTRED ORTHORHOMBIC
8. If r= ix+ jy+ kz then ∇xr is
R
O
3
1
9. A quantum 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 of the orbit is
4 ev
3 eV
1 eV
0
10. The wavelength of the green line of mercury is
4070 Angstrom
5461Angstrom
4358 Angstrom
6078 Angstrom
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