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Question

The concepts of holes is introduced based on

A
the notion that it is a whole lot easier to keep track of the missing particles in an "almost-full" band
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B
the keeping track of the actual electrons in that band
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C
the charge of holes
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D
none of the above
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Solution

The correct option is A the notion that it is a whole lot easier to keep track of the missing particles in an "almost-full" band
The concept of holes was introduced so as to occupy the empty spaces left by the missing electron. For example, in a valence band, when an electron jumps from valence to conduction band, an empty space is created in valence band which is occupied by a hole.

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