Assertion : Two p-n junction diodes placed back to back, will work as a n-p-n transistor. Reason: The p-region of two p-n junction diodes back to back

Monjur Alahi

Assertion : Two p-n junction diodes placed back to back, will work as a n-p-n transistor.
Reason: The p-region of two p-n junction diodes back to back will form the base of n-p-n transistor.
A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true not but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false
D. If both assertion and reason are false.


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Correct Answer - D
Two p-n junctions placed back to back cannot work as n-p-n transistor because in transistor the concentration of doping of p-type semiconductor is less as compared to doping of n-type semiconductor.

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