Question: Q. 4. The graph shown in the figure represents a plot of current versus voltage for a given semiconductor. Identify the region, if any, over which the semiconductor has a negative resistance.
U [OD I, II, III 2013]
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Solution:
Ans. The resistance of a material can be found out by the slope of the curve $V v$ v. I. Part $B C$ of the curve shows the negative resistance as with the increase in voltage current decreases.
[CBSE Marking Scheme 2013]
Detailed Answer :
It is known that negative resistance is a property of an electrical circuits/devices where an increase in voltage across the device terminals results in decrease in electric current through it. From the graph, it is observed that region $B C$ experiences negative resistance.
Short Answer Type Questions-I
(2 marks each)
