Questions in semiconductor

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	When a semiconductor is heated, its resistance
	In an insulator, the forbidden energy gap between the valence band and conduction band is of the order of
	A N-type semiconductor is
	The energy band gap of $Si$ is
	The forbidden energy band gap in conductors, semiconductors and insulators are $E{{G}_{1}},\,E{{G}_{2}}$and $E{{G}_{3}}$ respectively. The relation among them is
	Which statement is correct
	When Ge crystals are doped with phosphorus atom, then it becomes
	Let ${{n}_{P}}$ and ${{n}_{e}}$ be the number of holes and conduction electrons respectively in a semiconductor. Then
	Wires P and Q have the same resistance at ordinary (room) temperature. When heated, resistance of increases and that of Q decreases. We conclude that
	The impurity atoms which are mixed with pure silicon to make a P-type semiconductor are those of