If the temperature is increased in semi-conductors such that the resistance incessantly falls, it is termed as.

If the temperature is increased in semi-conductors such that the resis

1.	If the temperature is increased in semi-conductors such that the resistance incessantly falls, it is termed as.
Answer» Solution : We have `(f_(L))/(V + v _(L)) = (f _(S))/( v + v _(S))` `therefore (f _(L))/( v + 0) = (f _(S))/( v -v _(S))` `therefore f _(L) = ((v)/(v - v _(S)) ) f _(S) ""...(1)` We have `(f ._(L))/( v + v _(L)) = (f _(S))/( v + v _(S))` `therefore (f ._(L))/( v + 0) = (f _(S))/( v + v _(S))` `therefore f ._(L) = ((v)/( v + v _(S)) ) f _(S)""...(2)` Taking ratio of EQUATION (2) to equation (1) we get, `(f ._(L))/( f _(L)) = ((v - v _(S))/( v + v _(S)))` ` therefore f ._(L) = ((v - v _(S))/( v + v _(S))) f_(L)` `therefore f ._(L) lt f _(L)` Figure given in option (C) is correct.