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1.8k
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Define the term space lattice, unit cell and lattice parameter.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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2.9k
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Describe the types of liquid crystal & their properties.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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2.9k
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Explain the principle, construction & working of a LED.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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1.6k
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What is reverberation? Define Reverberation time. Explain its role in acoustics.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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7.8k
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In a solid, consider the energy level lying 0.012ev below Fermi level. What is the probability of this level not being occupied by an electron? Given T=300 Kelvin. Ks=1.38×10-23 j/K.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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11k
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Explain ionic polarization & derive the expression for ionic polarizability.
wave theory propagation updated 4.9 years ago by teamques10 ★ 70k
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1.2k
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If cos(x+iy) cos(u+iv)=1, where x,y,u, v are real then show that tanh2 cosh2 v=sin2u.
engineering mathematics updated 4.9 years ago by teamques10 ★ 70k
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1.2k
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Explain analysis of crystal structure using Bragg's X-ray spectrometer.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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16k
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A class room has dimensions 20 × 15 × 5 m3. The reverberation time is 3.5 sec. Calculate the total absorption of its surface and average absorption coefficient.
control systems updated 4.9 years ago by teamques10 ★ 70k
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904
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Monochromatic high energy x-rays are incident on a crystal. If 1st order reflection is observed at an angle 3.4°, at what angle would 2nd order reflection be expected.
wave theory propagation updated 4.9 years ago by teamques10 ★ 70k
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16k
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Calculate electronic polarizability of Argon atom. Given relative permittivity is 1.0024 at NTP and the gas contains 2.7 × 1025 atoms per m3.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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754
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1
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Draw the following w.r.t. a cubic unit cell: (1 1 1) (1 1 1) (1 2 3).
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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643
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Explain with neat lebelled diagram the construction and working of a piezoelectric oscillator.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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624
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Estimate the ratio of vacancies at (i) -119°C (ii) 80°C where average required to create vacancy is 1.8eV.
digital communication updated 4.9 years ago by teamques10 ★ 70k
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6.1k
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What is Hall effect? Derive expression for Hall voltage with neat labelled diagram.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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1.4k
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Define ligancy. Find the value of critical radius ratio for ligancy 4.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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1.7k
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Zn has hcp structure. The nearest neighbour distance is 0.27 nm. The atomic weight of Zn is 65.37. Calculate the volume of unit cell, density and atomic packing fraction of Zn.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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966
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Explain formation of energy bands in solids and explain classification on the basis of energy band theory.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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1.7k
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if x = u cosv, y = u sinv ( ext {Prove that}dfrac{partial (u,v)}{partial (x,y)},dfrac{partial (x,y)}{partial (u,v)}=1 )
engineering mathematics updated 4.9 years ago by teamques10 ★ 70k
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782
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Write Sabine's formula and explain the terms used in it.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
0
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804
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State and explain Ohm's law in magnetic circuit.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
0
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777
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1
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What is dielectric polarization and dielectric susceptibility? Write the relation between them.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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932
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1
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Define drift current, diffusion current and mobility of charge carriers.
analog electronics updated 4.9 years ago by teamques10 ★ 70k
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509
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Prove the following: \[\Big [\bar b \times\bar a\ \ \ \bar a \times\bar c \ \ \ \bar a \times \bar b \Big] = \Big[ \bar a \ \ \bar b \ \ \bar c \Big]^2\]
engineering mathematics updated 4.9 years ago by teamques10 ★ 70k
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451
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Prove the following: \[\log \ \sec \ x = \Big [ \dfrac{x^2}{2}+\dfrac{x^4}{12}+\dfrac{x^6}{45}... \Big]\]
engineering mathematics updated 4.9 years ago by teamques10 ★ 70k
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