SEMICONDUCTOR-II

Statement-I : Germanium is preferred over silicon for making semiconductor devices Statement-II : Energy gap for Ge is more than that of SI

Match the items in column I with the items given in Column II. Column -I (i) Mg in solid state (ii) MgCl_(2) in molten state (iii) Silicon with phosphrous (iv) Germanium with boron Column -II (a) p-Type semiconductor (b) n-type semiconductors (c) Electrolytic conductors (d) Electronic conductors

Statement-I : Semiconductors do not obey Ohm's law Statement-II : Electric current is determined by the rate of flow of charge carries.

What are types of following semiconductors I and II .

Germanium has been doped with impurity as shown in I, II, III and IV and based as it statements A. n-type semiconductor is formed in I and III B. p-type semiconductor is formed in II and IV C. P-type semiconductor is formed in II and IV D. p-type semiconductor is formed in I and III Select the correct statement(s).

Define resistivity of the material. State its SI unit and discuss its variation with temperature in case of (i) metals (ii) semiconductors and (iii) insulators.

Match the impurity doped semiconductor (column I) with its type (column II)