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.A. If both the assertion and reason are true and reason is a true explantion of the assertion.B. If both the assertion and reason are true but the reason is not true the correct explantion of the assertion.C. If the assertion is true but reason falseD. If both the assertion and reason are false.

Assertion: Two `P-N` junction diodes placed back to back, will work as

1.	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.A. If both the assertion and reason are true and reason is a true explantion of the assertion.B. If both the assertion and reason are true but the reason is not true the correct explantion of the assertion.C. If the assertion is true but reason falseD. If both the assertion and reason are false.
Answer» Correct Answer - D Two `PN`-junction placed back to back cannot work as `NPN` transistor because in transistor the width and concentration of doping of `P`-semiconductor is less as comapred to width doping of `N`-type semiconductor type.

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