". VdoTips
1. Electrical conductivity of insulators is the range _____________.
(A).10-10(O-mm)-1
(B).10-10(O-cm)-1
(C).10-10(O-m)-1
(D).10-8(O-m)-1


2. Units for electric field strength
(A).A/cm2
(B).mho/meter
(C).cm2/V.s
(D).V/cm


3. Energy band gap size for semiconductors is in the range ________ eV. (a)1-2
(B).2-3
(C).3-4
(D).> 4


4. Energy band gap size for insulators is in the range ________ eV. (a)1-2
(B).2-3
(C).3-4
(D).> 4


5. Flow of electrons is affected by the following
(A).Thermal vibrations
(B).Impurity atoms
(C).Crystal defects
(D).all