Variation of current passing through a conductor as the voltage applied across its ends as varied is shown in the adjoining diagram. If the resistance (R) is determined at the points A, B, C and D, we will find that
(1) RC = RD
(2) RB > RA
(3) RC > RB
(4) None of these
(4) From the curve it is clear that slopes at points A, B, C, D have following order A > B > C > D.
And also resistance at any point equals to slope of the V-i curve.
So order of resistance at three points will be