Answer / sachinvom

PNP and NPN. A PNP transistor is that in which a N-type
semiconductor is sand witched between two P-type
semiconductor. A NPN transistor is that in which a P-
type semiconductor is sand - witched between two N-type
semiconductors.

Answer / shatrudhan prasad

two type of transister,npn,pnp.we made npn transister .when select two pn diode thanafter join together.p terminal of first diode is join together p terminal of second diode.

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