Computer Programming MCQs

5739 MCQs  (Page 250 of 574)

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In graphite, bonding is____________?
A. Covalent
B. Metallic
C. Vander waals
D. Vander waals and covalent
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A carbon resistor contains_____________?
A. Carbon crystals
B. Solid carbon granules
C. Pulverized coal
D. Finely divided carbon black
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Total number of crystal systems is____________?
A. 2
B. 4
C. 7
D. 12
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The resistivity of a metal is a function of temperature because_____________?
A. The amplitude of vibration of the atoms varies with temperature
B. The electron density varies with temperature
C. The electron gas density varies with temperature
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Due to which of the following reasons aluminium does not corrode in atmosphere ?
A. Aluminium is a noble metal
B. Atmospheric oxygen can only diffuse very slowly through the oxide layer which is formed on the surface of aluminium
C. No reaction with oxygen occurs ft any of the above
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The conductivity of a metal is determined by____________?
A. The electronic concentration and the mobility of the free electrons
B. The number of valence electrons per atom
C. Either (a) or (b)
D. None of the above
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In a crystal, an atom vibrates at a frequency determined by_______________?
A. The heat content of the crystal
B. The temperature of the crystal
C. The stiffness of the bonds it makes with neighbors
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The number of atoms per unit cell in B.C.C. structure is_____________?
A. 1
B. 2
C. 4
D. 8
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Which of the following material is not a semiconductor ?
A. Silica
B. Germanium
C. Selenium
D. Gallium-arsenide
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Carbon rods are used in wet and dry cells because_____________?
A. Carbon rod serves as conductor
B. Carbon can resist the attack of battery acid
C. Both (a) and (b)
D. Either (a) or (b)
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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