To a germanium sample, traces of gallium are added as an impurity. The resultant sample would behave like
a conductor
an n-type semiconductor
a insulator
a p-type semiconductor
A
a p-type semiconductor
B
an n-type semiconductor
C
a conductor
D
a insulator
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Solution
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Gallium is a trivalent atom. When it is added to the germanium, extra hole is created in lattice by each gallium atom. Hole is assumed to have a positive charge on it, hence germanium will behave like a p-type semiconductor.
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