Collector-to-Base Bias MCQ’s

This set of Electronic Devices & Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Collector-to-Base Bias”.

1. The collector to emitter voltage (V_CE) is obtained by_________
a) V_CC – RC(I_C-I_B)
b) V_CC – RC(I_C+I_B)
c) V_CC + RC(I_C+I_B)
d) V_CC + RC(I_C-I_B)

2. What is the DC characteristic used to prove that the transistor is indeed biased in saturation mode?
a) I_C = βI_B
b) I_C > βI_B
c) I_C >> βI_B
d) I_C < βI_B

3. The collector current (I_C) that is obtained in a collector to base biased transistor is_________
a) (V_CC-V_BE)/R_B
b) (V_CC+V_BE)/R_B
c) (V_CE-V_BE)/R_B
d) (V_CE+V_BE)/R_B

4. The thermal runway is avoided in a collector to base bias because_________
a) of its independence of β
b) of the positive feedback produced by the base resistor
c) of the negative feedback produced by the base resistor
d) of its dependence of β

5. The demerit of a collector to base bias is_________
a) its need of high resistance values
b) its dependence on β
c) its independence on β
d) the positive feedback produced by the base resistor

6. In the circuit, transistor has β =60, V_BE=0.7V. Find the collector to emitter voltage drop V_CE.

a) 5V
b) 3V
c) 8V
d) 6V

7. When the temperature is increased, what happens to the collector current after a feedback is given?
a) it remains same
b) it increases
c) it cannot be predicted
d) it decreases

8. The negative feedback does good for DC signal by_________
a) decreasing the gain
b) increasing the gain
c) stabilising the operating point
d) increasing the stability factor

9. In the circuit shown below, β =100 and V_BE=0.7V. The Zener diode has a breakdown voltage of 6V. Find the operating point.

a) (6.7V, 5.3mA)
b) (5.7V, 5.3mA)
c) (6.7V, 5mA)
d) (6V, 5mA)

10. When the β value is large for a given transistor, the I_C and V_CE values are given by_________
a) (V_CC-V_BE)/R_B, V_CC-RCI_C
b) (V_CC+V_BE)/R_B, V_CC-RC(I_C+I_B)
c) (V_CC+V_BE)/R_B, V_CC+RC(I_C+I_B)
d) (V_CC+V_BE)/R_B, V_CC+RC(I_C-I_B)