Explore topic-wise MCQs in Electronic Devices Circuits.

This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices Circuits knowledge and support exam preparation. Choose a topic below to get started.

1.

What will happen if a capacitor is connected in parallel with RE in the amplifier design which uses emitter feedback bias circuit?

A. No changes
B. Gain value increases
C. Feedback increases
D. Gain value remains the same but feedback doubles
Answer» C. Feedback increases
2.

In order to make an amplifier which of the following biasing technique is used more?

A. Fixed bias
B. Self bias
C. Collector to base bias
D. Emitter feedback bias
Answer» E.
3.

For an emitter feedback bias Circuit having, RE=1Kohm, RC= 4.7Kohm, IB=0.005mA, IE = 1mA, VCC = 12V and Vce = 5V. Find the value of beta.

A. 254
B. 100
C. 1000
D. 500
Answer» B. 100
4.

For an emitter feedback bias circuit, RC is 10Kohm, Re= 5Kohm, RB = 1Kohm, If IC = 1mA, current gain is_________________

A. 4
B. 2
C. 5
D. 6
Answer» C. 5
5.

For an emitter feedback bias circuit, the value of VCC = 10V, RB = 10Kohm, RE=1Kohm and RC=2Kohm, if current flowing through collector is 0.5mA, what is the voltage difference between collector and emitter?

A. 8.5V
B. 9V
C. 10V
D. 10.5V
Answer» B. 9V
6.

For emitter feedback bias, to make IC independent of DC current gain, which of the following condition is required?

A. RC >> RB/dc current gain
B. RE >> RB/dc current gain
C. RB >> RC/dc current gain
D. Re >> RC/dc current gain
Answer» B. RE >> RB/dc current gain
7.

IN_ORDER_TO_MAKE_AN_AMPLIFIER_WHICH_OF_THE_FOLLOWING_BIASING_TECHNIQUE_IS_USED_MORE??$

A. Fixed bias
B. Self bias
C. Collector to base bias
D. Emitter feedback bias
Answer» E.
8.

What_will_happen_if_a_capacitor_is_connected_in_parallel_with_RE_in_the_amplifier_design_which_uses_emitter_feedback_bias_circuit?$

A. No changes
B. Gain value increases
C. Feedback increases
D. Gain value remains the same but feedback doubles
Answer» C. Feedback increases
9.

Among the following statements which one is true according to feedback bias?

A. Fixed bias is more stable than emitter feedback bias
B. Fixed bias produces more feedback than emitter feedback bias
C. Emitter feedback bias is more stable than the fixed bias
D. Fixed and emitter bias have same stability and feedback
Answer» D. Fixed and emitter bias have same stability and feedback
10.

Which of the following statement is the main disadvantage of emitter feedback bias?

A. Reduces the gain
B. Positive feedback
C. Design is difficult
D. High output impedance
Answer» B. Positive feedback
11.

For an emitter feedback bias Circuit having, RE=1Kohm, RC= 4.7Kohm, IB=0.005mA, IE = 1mA, VCC = 12V and Vce = 5V. Find the value of beta.

A. 254
B. 100
C. 1000
D. 500
Answer» B. 100
12.

What will be the temperature changes effects on the emitter feedback circuit?

A. Increases voltage gain
B. Increases current gain
C. Does not affect the gain
D. Decreases both current and voltage gain
Answer» D. Decreases both current and voltage gain
13.

The feedback helps to maintain a constant gain value.

A. True
B. False
Answer» B. False
14.

For an emitter feedback bias circuit, RC is 10Kohm, Re= 5Kohm, RB = 1Kohm, If IC = 1mA, current gain is

A.
B. 4
C. 2
Answer» C. 2
15.

For an emitter feedback bias circuit, the value of VCC = 10V, RB = 10Kohm, RE=1Kohm and RC=2Kohm, if current flowing through collector is 0.5mA, what is the voltage difference between collector and emitter?

A. 8.5V
B. 9V
C. 10V
D. 10.5V
Answer» B. 9V
16.

For emitter feedback bias, to make IC independent of DC current gain, which of the following condition is required?

A. R<sub>C</sub> >> R<sub>B</sub>/dc current gain
B. R<sub>E</sub> >> R<sub>B</sub>/dc current gain
C. R<sub>B</sub> >> R<sub>C</sub>/dc current gain
D. R<sub>e</sub> >> R<sub>C</sub>/dc current gain
Answer» B. R<sub>E</sub> >> R<sub>B</sub>/dc current gain