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JEE PHYSICS MCQ: SEMI CONDUCTOR DEVICES
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Medium
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Understanding
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Some statements are given about semi-conductors
a. Semi-conductor materials have crystalline structure and their atoms are bound together by covalent bonds
b. On adding suitable impurity even in small amounts, conductivity of semi-conductors increases appreciably.
c. Semi-conductor materials have sharply defined energy-levels for any electron belonging to a particular orbit.
d. Semi-conductors have negative temperature coefficient of resistance.
a. Semi-conductor materials have crystalline structure and their atoms are bound together by covalent bonds
b. On adding suitable impurity even in small amounts, conductivity of semi-conductors increases appreciably.
c. Semi-conductor materials have sharply defined energy-levels for any electron belonging to a particular orbit.
d. Semi-conductors have negative temperature coefficient of resistance.
View answer and explanation
Correct option: D
Only a, b and d are correct
Option D (Only a, b and d are correct) is correct because semiconductors have crystalline structures, their conductivity increases with impurities, and they have a negative temperature coefficient of resistance.
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