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12th West Bengal Board
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For an insulator, forbidden energy gap is

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Important Questions on Electronic Devices

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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 3
When a solid with a band gap has a donor level just below its empty energy band, the solid is
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 4
In an intrinsic semiconductor the ratio of free electrons and holes is
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 5
In a semiconductor the forbidden energy gap in between valence band conduction band is about
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12th West Bengal Board
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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 6
The forbidden energy gap in Ge and Si respectively are
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12th West Bengal Board
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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 7

The impurity atoms that should be added to germanium to make it n-type is

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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 8
The impurity atoms to be doped in germanium to make it p-type is
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 9
The main difference between conductor, semiconductor and insulator is
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12th West Bengal Board
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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 21 - Electronic Devices>EXERCISE 21>Q 10
The temperature coefficient of resistance of a semiconductor