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State the terms : magnetostriction effect; piezoelectric effect
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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What is the probability of an electron being thermally excited to conduction band in silicon at 20oC. The band gap energy is 1.12eV; Boltzmann constant is 1.38 x 10-23 JIk.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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Explain term lattice parameters of cubic crystal.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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What is piezoelectric effect. Explain the working of piezoelectric Oscillator used to produce ultrasonic wave.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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How is a p-n junction diode used to generate a potential difference in photovoltaic solar cell ?
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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Explain difference between three liquid crystals w.r.t the order in arrangement of molecules with the help of diagram. Which property of liquid crystal is used for display?
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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Define reverberation time . Write sabine's formula explaining each term. What are the factors which determine average absorption co-efficient of a material
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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Explain the principle, construction and working of a magnetostriction oscillator to produce ultrasonic waves.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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In an n-type semiconductor the fermi level lies 0.4eV below conduction band. If concentration of donor atom is doubled, find the new position of the Fermi Level w.r.t. the conduction band.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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Derive Bragg's law. Explain why x-rays and not ? rays are used for crystal structure analysis. What data about crystal structure can be obtained from the x-ray diffraction pattern of a crystal?
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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Calculate the change in intensity level the intensity of sound increases 1000 times its original intensity.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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Draw energy band diagram of an unbiased p-n junction and mark the barrier potential and depletion region.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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Fermi level in K is 2.1 eV. What are energies for which the probabilities of occupancy at 300K are 0.99 and 0.01 ?
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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What is Fermi level in semiconductor? Show that in intrinsic semiconductor Fermi level always at the middle between the forbidden energy gap?
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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Explain the formation of depletion region in P-N junction.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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Identify the crystal structure if its density is 9.6 x 102 kg/m3, lattice constant is 4.3 A? and atomic weight is 23.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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What is dielectric polarization and dielectric susceptibility? Find the relation between them?
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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740
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Define ligancy and critical radius ratio in case of ionic solid. Write the conditions for stability of ionic crystal in 3-D ? Determine critical radius ratio for ligancy 6.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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Explain the hall effect in metal ? Derive the formulae to determine the density and mobility of the electrons.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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576
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State with neat diagram direct and inverse Piezoelectric effect.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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395
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Represent the following in the cubic unit cell :- (IT2), (002), [121]
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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727
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Find the interplaner spacing between the family of planes (111) in a crystal of lattice constant 3A?.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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775
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Define the term space lattice, unit cell and lattice parameter.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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354
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Explain the formation of barries potential in P-N Junction.
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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632
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Explain piezoelectric oscillator to produce USW?
engineering physics updated 3.3 years ago by teamques10 ★ 66k
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