Voltage Amplifiers MCQ’s

This set of Electronic Devices & Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Voltage Amplifiers”.

1. A swamped amplifier has ________ input impedance as compared to CE stage amplifier.
a) smaller
b) equal
c) larger
d) zero

2. We can increase _______ to reduce distortion of an amplified signal.
a) Collector resistance
b) Emitter feedback resistance
c) Generator resistance
d) Load resistance

3. The emitter of a swamped amplifier __________
a) is grounded
b) has no dc voltage
c) has an ac voltage
d) has no ac voltage

4. A swamped amplifier uses________
a) Base bias
b) Positive feedback
c) Negative feedback
d) A grounded emitter

5. What is the function of feedback resistor?
a) To increase voltage gain
b) Reduce distortion
c) Decrease collector resistance
d) Decrease input impedance

6. If any capacitor is open, the ac output voltage wills ____________
a) Decrease
b) Increase
c) Remains the same
d) Equals zero

7. In a swamped amplifier, the effects of the emitter diode become _________
a) Important to the voltage gain
b) Critical to input impedance
c) Significant to analysis
d) Unimportant

8. If the emitter bypass capacitor is open , the ac output voltage will ____________
a) decrease
b) increase
c) remains the same
d) equals zero

9. If the emitter resistor is open, the ac input voltage will __________
a) Decrease
b) Increase
c) Remains the same
d) Equals zero

10. The input impedance of the base increases when ______
a) Beta increases
b) Supply voltage increases
c) Beta decreases
d) AC collector resistance increases.

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