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1.3k
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Describe the formation of energy band in solid? Explain how it helps to classify the solid in to conductors, insulator and semiconductor with proper diagram.
integrated circuits updated 4.9 years ago by teamques10 ★ 70k
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507
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1
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State and explain ohm's law in magnetic circuit?
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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720
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1
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What is Hall effect? Mention its significance. How mobility can be determined by using Hall effect?
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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1
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1.5k
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1
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Represent the following in the cubic unit cell (021), (123), [121]
engineering physics updated 4.9 years ago by teamques10 ★ 70k
0
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634
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1
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What is x-rays? Why the x-ray are prefered to study crystaline solid.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
0
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1
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545
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1
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Explain how a voltage difference is generated in a p- junction when it is used in a photovoltaic solar cell.
engineering chemistry updated 4.9 years ago by teamques10 ★ 70k
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1.5k
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1
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Write Sabine's formula explaining each term. Explain how this formula can be used for the determination of absorption co-efficient of a given material.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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2.9k
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1
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Calculate Bragg angle if (200) planes of a BCC crystal with lattice parameter 2.814Å give second order reflection with X-rays of wavelength 0.71Å.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
0
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511
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Define space lattice and basis. A metal crystallizes with a density of 2.7gm/cc and has a packing fraction of 0.74. Determine the mass of one atom if the nearest neighbour distance is 2.86Å.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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1.1k
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What is effective mass? Why the effective mass of holes is more than the effective mass of electrons?
analog electronics updated 4.9 years ago by teamques10 ★ 70k
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729
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What is piezoelectric effect? Why ferro-electrics are prefferred than quartz for the production of ultrasonic waves?
engineering physics updated 4.9 years ago by teamques10 ★ 70k
0
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1.2k
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1
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Explain the formation of depletion region in an unbiased p-n junction.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
0
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13k
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Fermi Energy for Silver is 5.5 eV. Find out the energy for which the probability of occupancy at 300K is 0.9.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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3.4k
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Briefly explain the different types of point defects.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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1
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1.9k
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1
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Describe principle, construction and working of magnetostriction oscillator to produce ultrasonic waves.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
0
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8.4k
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1
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Calculate the length of an iron rod which can be used to produce ultrasonic waves of 20kHz Given - Y = 11.6 × 1010N/m2, ρ = 7.23 × 103 kg/m3
need-tagging updated 4.9 years ago by teamques10 ★ 70k
2
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13k
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Classify solids on the basis of energy band diagram.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
0
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443
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1
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Discuss Diamond structure with neat diagram and also determine the effective number of atoms / unit cell, co-ordination number and atomic radius in tems of lattice constant.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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337
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1
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\[If\frac{{\left(a+ib\right)}^{x+1y}\ }{{\left(a-ib\right)}^{x-1y}}=a+i\beta \ then\ find\ \alpha{}\ \&\ \beta{}\]
engineering mathematics updated 4.9 years ago by teamques10 ★ 70k
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872
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1
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Cu has FCC structure. If the interplanar spacing d is 2.08 A° for the set of (111) planes. Find the density and diameter of Cu atom. Give atomic weight of Cu is 63.54.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
0
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1
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603
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1
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Calculate the electronic polarizability of A1. Given number of Air atoms at NTP=2.7×1025/m3 and dielectric constant of Ar=1.0024.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
0
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1
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722
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1
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Why soft magnetic materials are used in core of transformers?
analog electronics updated 4.9 years ago by teamques10 ★ 70k
1
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1
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2.4k
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1
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What is the probability of an electron being thermally promoted to conduction band in diamond at 27°C, if bandgap is 5.6 eV wide.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
0
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665
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1
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Define: drift current, diffusion current and mobility of charge carriers.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
0
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3.2k
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1
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Determine the lattice constant for FCC lead crystal of radius 1.746 Å and also find the spacing of (2 2 0) plane.
engineering physics updated 4.9 years ago by teamques10 ★ 70k
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