186. An intrinsic semiconductor has :
(a) A finite resistance, independent of temperature change
(b) A finite resistance which decreases with temperature
(c) A finite resistance which increases with temperature
(d) None of the above
187. The conductivity of semiconductor :
(a) Is independent of temperature
(b) Varies inversely as temperature
(c) Increases with increase in temperature
(d) May increase or many decrease with rise in temperature
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