-Refer to b)in the figure above. If this circuit has a Vin = 0.7, Vout would be
A)0 V.
B)14.7 V.
C)- 14.7 V.
D)14 V.

Question

-Refer to b)in the figure above. If this circuit has a Vin = 0.7, Vout would be
A)0 V. 
B)14.7 V. 
C)- 14.7 V. 
D)14 V.

Quizplus · Accepted Answer

Given Vin = 0.7V, the transistor is in the active region (since Vbe is typically around 0.7V for silicon transistors to turn on). The transistor acts as a closed switch, effectively connecting the collector to the emitter. Since the question implies a common-emitter configuration and assuming the transistor is saturated, Vout would be close to Vcc (15V) minus Vce_sat (saturation voltage, typically around 0.3V for silicon transistors), resulting in approximately 14.7V.

-Refer to B)in the Figure Above