A) 70, 68.6
B) 80, 75.6
C) 60, 66.6
D) 90, 96.6
Correct Answer: A
Solution :
In common base mode a = 0.98, R = 5 kW, Rin = 70W \ voltage gain \[{{A}_{v}}=\alpha \times \frac{R}{{{R}_{in}}}=0.98\times \frac{5\times {{10}^{3}}}{70}=70\] Power gain = Current gain ´ Voltage gain = 0.98 ´ 70 = 68.6
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