A) 10
B) 50
C) 25
D) 40
Correct Answer: A
Solution :
\[\mu =-{{\left( \frac{\Delta {{V}_{p}}}{\Delta {{V}_{g}}} \right)}_{\Delta {{i}_{p}}=\,\text{const}\text{.}}}=\frac{-(80-60)}{[-6-(-4)]}=\frac{20}{2}=10\]
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