Computer Programming MCQs

5739 MCQs  (Page 249 of 574)

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_________ is an example of piezoelectric material?
A. Glass
B. Quartz
C. Corrundum
D. Neoprene
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A good electric contact material should have all of the following properties except_____________?
A. High resistivity
B. High resistance to corrosion
C. Good thermal conductivity
D. High melting point
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Thermonic emission occurs in______________?
A. Vacuum tubes
B. Copper conductors
C. Ferrite cores
D. Transistors
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Addition of 0.3 to 4.5% silicon to iron ________ the electrical resistivity of iron?
A. Increases
B. Decreases
C. Does not change
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Most of the common metals have _________ structure?
A. Linear
B. Hexagonal
C. Orthorhombic
D. Cubic
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__________ is a hard solder?
A. Tin-lead
B. Tin-silver-lead
C. Copper-zinc
D. None of the above
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Which of the following affect greatly the resistivity of electrical conductors ?
A. Composition
B. Pressure
C. Size
D. Temperature
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Super conductivity can be destroyed by_____________?
A. Adding impurities
B. Reducing temperatures
C. Application of magnetic field
D. Any of the above
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Which of the following materials does not have covalent bonds ?
A. Organic polymers
B. Silicon
C. Metals
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Non-linear resistors______________?
A. Produce harmonic distortion
B. Follows ohm’s law at low temperatures only
C. Result in non-uniform heating
D. None of the above
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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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