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Explain the principle, construction & working of a LED.
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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What is reverberation? Define Reverberation time. Explain its role in acoustics.
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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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 4.8 years ago by teamques10 ★ 70k
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Explain analysis of crystal structure using Bragg's X-ray spectrometer.
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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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 4.8 years ago by teamques10 ★ 70k
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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 4.8 years ago by teamques10 ★ 70k
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Explain with neat lebelled diagram the construction and working of a piezoelectric oscillator.
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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What is Hall effect? Derive expression for Hall voltage with neat labelled diagram.
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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Define ligancy. Find the value of critical radius ratio for ligancy 4.
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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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 4.8 years ago by teamques10 ★ 70k
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Explain formation of energy bands in solids and explain classification on the basis of energy band theory.
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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Write Sabine's formula and explain the terms used in it.
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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State and explain Ohm's law in magnetic circuit.
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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What is dielectric polarization and dielectric susceptibility? Write the relation between them.
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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Give the main physical changes that take place at the nano scale with its applications.
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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Explain special effects of the following metals on properties of alloy steels. (i) Chromium (ii) Nickel (iii) Cobalt (iv) Tungsten
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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What is nano material? Give two properties of nano materials which make them different and superior to conventional materials.
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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Explain the following properties and discuss its significance Viscosity and Viscosity index.
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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Define and give the significance of the following properties of lubricants: i) Flash Point ii) Pour point iii) Viscosity Index
engineering physics updated 4.8 years ago by teamques10 ★ 70k
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State the piezoelectric effect. With neat circuit diagram explain the principle and working of piezoelectric oscillator.
engineering physics updated 5.9 years ago by teamques10 ★ 70k
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A quartz crystal of thickness 1.5mm vibrating with resonance.
engineering physics updated 5.9 years ago by teamques10 ★ 70k
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State the piezoelectric effect. With neat circuit diagram explain the principle and working of piezoelectric oscillator.
engineering physics updated 5.9 years ago by teamques10 ★ 70k
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A quartz crystal of thickness 1.5mm is vibrating with resonance
engineering physics updated 5.9 years ago by teamques10 ★ 70k
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Find the depth of sea water from a ship on the sea surface it the time interval of two seconds is required to receive the signal back.
engineering physics updated 5.9 years ago by teamques10 ★ 70k
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Explain the principle, construction and working of a Magnetostriction Oscillator.
engineering physics updated 5.9 years ago by teamques10 ★ 70k
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