Question
Question: A transistor is used as an amplifier in CB mode with a load resistance of 5 kW the current gain of a...
A transistor is used as an amplifier in CB mode with a load resistance of 5 kW the current gain of amplifier is 0.98 and the input resistance is 70 W, the voltage gain and power gain respectively are –
A
70, 68.6
B
80, 75.6
C
60, 66.6
D
90, 96.6
Answer
70, 68.6
Explanation
Solution
a = IEIC= 0.98
Va = a RinRL= 0.98 × 705×103
Pa = a2 RinRL = (0.98)2 × 705×103