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A npn transistor conducts when...

A `npn` transistor conducts when

A

both collector and emitter are positive with respect to the base

B

collector is positive and emitter is negative with respect to the base

C

collector is positive and emitter is at same potential as the base

D

both collector and emitter are negative with respect to the base

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The correct Answer is:
B, D
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ALLEN -SEMICONDUCTORS-Part-3(Exercise-1)
  1. Increasing forward voltage in diode, the width of depletion layer is …...

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  2. In an NPN transistor the collector current is 10 mA. If 90% of electro...

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  3. A npn transistor conducts when

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  4. For pure ''Ge'' semiconductor quantity of ''e'' and hole is 10^(19) e...

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  5. In given diagram which p-n junction in reverse biased

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  6. In a p-n junction diode having depletion layer of thickness 10^(-6)m, ...

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  7. A Ge specimen is doped with Al. The concentration of acceptor atoms is...

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  8. Assuming that the junction diode is ideal the current through the diod...

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  9. When two semiconductor of p and n type are brought in to contact, they...

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  10. In a forward biased PN- junction diode, the potential barrier in the d...

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  11. For a common base configuration of PNP transistor (l(C))/(l(E))=0.98, ...

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  12. For a transistor (I(C))/(I(E))=0.96, then current gain for common emit...

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  13. A transistor has an alpha = 0.95 It has change in emitter current of 1...

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  14. For a transistor I(e) = 25 mA and I(b) = 1mA. The value of current gai...

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  15. In Boolean algebra A + B = Y implies that :

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  16. Which of the following gate corresponds to the truth table given below...

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  17. In the Boolean algebra bar(A).bar(B) equals is :-

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  18. Given below are symbols for some logic gates :- The XOR gate and ...

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  19. The symbol represents :-

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  20. The truth table shown below is for which of the following gate :- {:...

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