Can two p-n junction diodes placed back to back work as a p-n-n transistor?
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No, by joining two p-n junction diode back to back, the n-region which will form the base will be too thick and will not serve the purpose of base in a transistor.
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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.
Assertion: Two P-N junction diodes placed back to back, will work as a NPN transistor. Reason: The P-N junction of two PN junction diodes back to back will form the base of NPN transistor.
