Download as Pdf *Click Here*

**Q1. When negative voltage feedback is applied to an amplifier, its voltage gain ……………….**

- Is increased
- Is reduced
- Remains the same
- None of the above

**Answer : 2****Q2. The value of negative feedback fraction is always …………….**

- Less than 1
- More than 1
- Equal to 1
- None of the above

**Answer : 1****Q3. If the output of an amplifier is 10 V and 100 mV from the output is fed back to the input, then feedback fraction is ………..**

- 10
- 1
- 01
- 15

**Answer : 3****Q4. The gain of an amplifier without feedback is 100 db. If a**** ****negative feedback of 3 db is applied, the gain of the amplifier will****become …………..**

- 5 db
- 300 db
- 103 db
- 97 db

**Answer : 4****Q5. If the feedback fraction of an amplifier is 0.01, then voltage gain with negative feedback is approximately………..**

- 500
- 100
- 1000
- 5000

**Answer : 2****Q6. A feedback circuit usually employs ……………… network**

- Resistive
- Capacitive
- Inductive
- None of the above

**Answer : 1****Q7. The gain of an amplifier with feedback is known as ………….. gain**

- Resonant
- Open loop
- Closed loop
- None of the above

**Answer : 3****Q8. When voltage feedback (negative) is applied to an amplifier, its input impedance ………….**

- Is decreased
- Is increased
- Remains the same
- None of the above

**Answer : 2****Q9. When current feedback (negative) is applied to an amplifier, its input impedance …………..**

- Is decreased
- Is increased
- Remains the same
- None of the above

**Answer : 1****Q10. Negative feedback is employed in ……………..**

- Oscillators
- Rectifiers
- Amplifiers
- None of the above

**Answer : 3****Q11. Emitter follower is used for …………**

- Current gain
- Impedance matching
- Voltage gain
- None of the above

**Answer : 2****Q12. The voltage gain of an emitter follower is ………..**

- Much less than 1
- Approximately equal to 1
- Greater than 1
- None of the above

**Answer : 2****Q13. When current feedback (negative) is applied to an amplifier, its output impedance ……..**

- Is increased
- Is decreased
- Remains the same
- None of the above

**Answer : 1****Q14. Emitter follower is a ……………….. circuit**

- Voltage feedback
- Current feedback
- Both voltage and current feedback
- None of the above

**Answer : 2****Q15. If voltage feedback (negative) is applied to an amplifier, its output impedance …………..**

- Remains the same
- Is increased
- Is decreased
- None of the above

Download as Pdf *Click Here*