Physics MCQs

852 MCQs  (Page 54 of 86)

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A vacant or partially filled band is called _____________________?
A. Conduction band
B. Valence band
C. Forbidden band
D. Empty band
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The electrons in conduction band are free to___________________?
A. Transport vibrations
B. Transport signals
C. Transport charge
D. Transport impulses
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Many of the semi conductors are crystals of the type__________________?
A. Face centred cubic
B. Body centred cubic
C. Simple cubic
D. All of the above
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Holes can exist in____________________?
A. Conductors
B. Insulators
C. Semi conductors
D. All of the above
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In a semiconductors the charge carriers are ___________________?
A. Holes only
B. Electrons only
C. Electron and holes both
D. All of the above
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The net charge on n-type material is____________________?
A. Positive
B. Negative
C. Both positive and negative
D. Neutral
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Magnetic force acting on a unit positive charge moving perpendicular to the magnetic field with a unit velocity is called____________________?
A. Magnetic flux
B. Magnetic field intensity
C. Magnetic induction
D. Self inductance
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A uniform steel wire of length 4m and area of cross-section 3×10-6m2 is extended by 1mm by the application of a force. If the youngs modulus of steel is 2×1011 Nm-2 the energy stored in the wire is___________________?
A. 0.025j
B. 0.50j
C. 0.75j
D. 0.100j
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Materials that undergo plastic deformation before breaking are called __________________?
A. Brittle
B. Ductile
C. Amorphous
D. Polymers
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A rubber cord of cross-sectional area 2cm2 has a length of 1m. When a tensile force of 10N is applied the length of the cord increases by 1cm. What is the youngs modulus of rubber ?
A. 2×108 nm-2
B. 5×106 nm-2
C. 0.5×10-6 nm-2
D. 0.2×10-6nm-2
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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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