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In a p-type semiconductor, there are mainly:

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Important Questions on Semiconductor Devices

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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Conceptual Questions)>Q 17
Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented byEgC, EgSi  and EgGe and respectively. Which one of the following relationships is true in their case?
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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Conceptual Questions)>Q 18
The impurity energy level of n-type semiconductor lies
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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Conceptual Questions)>Q 19
What is the energy gap in Si-semiconductors?
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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Conceptual Questions)>Q 20
Region which have no free electron and holes in a P–N junction is, 
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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Conceptual Questions)>Q 23
In a p-n junction diode, are not connected to any circuit 
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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Conceptual Questions)>Q 24
The minority current in a p-n junction is :-
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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Conceptual Questions)>Q 25
The majority current in a p-n junction is :-
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Beta Question Bank for Medical: Physics>Chapter 35 - Semiconductor Devices>Exercise (Conceptual Questions)>Q 27
In a.................biased P-N junction, the net flow holes is from N-region to the P-region :-