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What are Intrinsic and extrinsic semi-conductors?

Answer Text:
Intrinsic and extrinsic semi-conductors
-An intrinsic semiconductor is one which is pure enough such that the impurities in it do not significantly affect its
electrical behavior.Intrinsic semi-conductors increase their conductivity with increase in temperature unlike metals.An extrinsic
semi-conductor is one which has been doped withimpurities to modify its number and type of free charge carriers present.