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Write the function of three segments of ...

Write the function of three segments of a transistor.

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The function of emitter is to emit the majority carriers. Function of collector is to collect the majority carriers coming from emitter through base. Base provides the proper interaction between the emitter and the collector.
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    A
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    C
    both emitter and collector have same length
    D
    any one of emitter and collector can have greater length

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