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2
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13k
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What is the probability of an electron being thermally promoted to the conduction band in a diamond at $27^0 C$, if the band gap is 5.6 eV wide?
engineering physics updated 9.1 years ago by teamques10 ★ 70k
11
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85k
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Explain the principle, construction & working of a LED.
engineering physics updated 9.1 years ago by teamques10 ★ 70k
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Define Ligancy. Find the value of critical radius ratio for ligancy.
engineering physics updated 9.1 years ago by teamques10 ★ 70k
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Explain the statement crystal act as three dimensional grating with X-rays.
engineering physics updated 9.1 years ago by teamques10 ★ 70k
2
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Zn has HCP structure. The nearest neighbor distance is 0.27nm. The atomic weight of Zn is 65.37. Calculate the volume of unit cell, density and atomic packing fraction of Zn.
engineering physics updated 9.1 years ago by teamques10 ★ 70k
0
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Draw (i) $(1 \bar{1} 2)$ (ii)(0 4 0) (iii) [0 4 0] with reference to a cubic cell.
engineering physics updated 9.1 years ago by teamques10 ★ 70k
0
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Explain analysis of crystal structure using Braggs X-ray spectrometer.
engineering physics updated 9.1 years ago by teamques10 ★ 70k
0
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3.7k
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Monochromatic high energy x-rays are incident on a crystal. If 1st order reflection is observed at an angle $(3.4)^0$, at what angle would 2nd order reflection be expected.
engineering physics updated 9.1 years ago by teamques10 ★ 70k
0
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Draw the following w.r.t a cubic unit cell. $(1 \bar{1} 1)(\bar{1} 1 1)[1 2 3]$
engineering physics updated 9.1 years ago by teamques10 ★ 70k
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2.6k
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Draw the unit cell and Basis of DC structure.
engineering physics updated 9.1 years ago by teamques10 ★ 70k
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43k
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Describe principle, construction and working of magnetostriction oscillator to produce ultrasonic waves.
engineering physics updated 9.5 years ago by teamques10 ★ 70k
0
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1
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9.7k
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calculate the coefficient of absorption of curtain cloth.
engineering physics updated 9.5 years ago by teamques10 ★ 70k
2
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10k
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Write Sabines formula explaining each term. Explain how this formula can be used for the determination of absorption coefficient of a given material
engineering physics updated 9.5 years ago by teamques10 ★ 70k
4
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37k
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State the acoustic requirement of good auditorium. Explain how these requirements can be achieved.
engineering physics updated 9.5 years ago by teamques10 ★ 70k
0
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3.4k
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1
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Explain piezoelectric oscillator to produce USW.
engineering physics updated 9.5 years ago by teamques10 ★ 70k
1
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1
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12k
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State the acoustic requirements of a good auditorium. Explain how these requirements can be achieved.
engineering physics updated 9.5 years ago by teamques10 ★ 70k
0
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1
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11k
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State and explain Ohms law in magnetic circuit.
engineering physics updated 9.5 years ago by teamques10 ★ 70k
0
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1
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10k
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Draw the structure of quartz crystal and explain its various axes.
engineering physics updated 9.5 years ago by teamques10 ★ 70k
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3.2k
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An ultrasonic sound wave is used to detect the position of defect in a steel bar of thickness 50 cm. If the echo times are 40 and 90 s, locate the position of defect.
engineering physics updated 9.5 years ago by teamques10 ★ 70k
0
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1
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4.5k
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Define reverberation time. State Sabine's formula and explain the terms in it.
engineering physics updated 9.5 years ago by teamques10 ★ 70k
0
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1
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2.1k
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State with neat diagram direct and inverse piezoelectric current
engineering physics updated 9.5 years ago by teamques10 ★ 70k
10
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66k
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What is piezoelectric effect? Explain the working of a piezoelectric oscillator used to produce ultrasound.
engineering physics updated 9.5 years ago by teamques10 ★ 70k
0
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1
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6.4k
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Define reverberation time. Write Sabine's formula explaining every term. What are the factors which determine the average absorption coefficient of a material?
engineering physics updated 9.5 years ago by teamques10 ★ 70k
0
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4
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4.1k
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4
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Explain the absorption coefficient of a hall. Calculate the change in intensity level when the intensity of sound increases 1000 times its original intensity.
engineering physics updated 9.5 years ago by teamques10 ★ 70k
0
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1
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4.4k
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State the terms: magnetostriction effect; piezo-electric effect.
engineering physics updated 9.5 years ago by teamques10 ★ 70k
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