Statement I: Two P-N junction diodes placed back to back, will work as an NPN transistor.
Statement II: The P-region of two PN junction diodes back to back will form the base of NPN transistor.

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Statement I is correct but statement II is incorrect

Statement I is incorrect but statement II is correct

Both statements I and II are incorrect.

Both statements I and II are correct.

answer is D.

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Detailed Solution

Two PH-junctions placed back to back cannot work as NPN transistor because in transistor the width and concentration of doping of P-semiconductor is less as compared to width and doping of N-type semiconductor type.

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