Q. Variation of current passing through a conductor as the voltage applied across its ends is varied as shown in the adjoining diagram. If the resistance $(R)$ is determined at the points $A,B,C$ and $D,$ we will find that
A) $R_{C} = R_{D}$
B) $R_{B} > R_{A}$
C) $R_{C} > R_{B}$
D) None of these
Explanation
(d) 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 $R_{A} > R_{B} > R_{C} > R_{D}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.