Questions in semiconductor

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	Holes are charge carriers in
	In extrinsic P and N-type, semiconductor materials, the ratio of the impurity atoms to the pure semiconductor atoms is about
	A hole in a P-type semiconductor is
	The forbidden gap in the energy bands of germanium at room temperature is about
	In P-type semiconductor the majority and minority charge carriers are respectively
	At zero Kelvin a piece of germanium
	Electronic configuration of germanium is 2, 8, 18 and 4. To make it extrinsic semiconductor small quantity of antimony is added
	A semiconductor is cooled from ${{T}_{1}}K$ to ${{T}_{2}}K.$ Its resistance
	If ${{N}_{P}}$and ${{N}_{e}}$be the numbers of holes and conduction electrons in an extrinsic semiconductor, then
	In intrinsic semiconductor at room temperature, number of electrons and holes are