Solid State Physics - Study Mode
[#46] In a powder diffraction pattern recorded from a face centred cubic sample using X-rays, the first peak appears at 30°. The second peak will appear at
Correct Answer
(D) 35.3°
[#47] The critical magnetic field for a solid in superconducting state
Correct Answer
(C) increases if the temperature decreases
[#48] The valence electrons do not directly determine the following property of a metal
Correct Answer
(C) shear modulus
[#49] The solid phase of an element follows van der Waals bonding with inter-atomic potential $$Vleft( r
ight) = - frac{P}{{{r^6}}} + frac{Q}{{{r^{12}}}}$$ xa0 xa0where, P and Q are constants. The bond length can be expressed as
Correct Answer
(A) $${left( {frac{{2Q}}{P}}
ight)^{ - 6}}$$
[#50] A system containing N non-interacting localized particles of spin $$frac{1}{2}$$ and magnetic moment $$mu $$ each is kept in constant external magnetic field B and in normal equilibrium at temperature T. The magnetization of the system is
Correct Answer
(B) $$Nmu anh left( {frac{{mu B}}{{{k_B}T}}}
ight)$$