Which part of the curve shown in fig represents the postitive resistane?

A B

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B C

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C D

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D E

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Solution

The correct options are
A $A B$
B $B C$
D $D E$
$R e s i s t a n c e = \frac{1}{s l o p e}$

Region of positive slope represents positive resistance.
In the given figure, AB,BC and DE represents positive resistance.

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