Discussion
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- Question
Current actually flows into or out of a virtual ground.
Options- A. True
- B. False
- Correct Answer
- False
- 1. A virtual ground is a ground for current, but not for voltage.
Options- A. True
- B. False Discuss
- 2. Changing the input voltage to an op-amp circuit will change its voltage gain.
Options- A. True
- B. False Discuss
- 3. An operational amplifier contains a differential amplifier, a voltage amplifier, and an output amplifier.
Options- A. True
- B. False Discuss
- 4. This circuit is a voltage follower.
Options- A. True
- B. False Discuss
- 5. If the frequency of an astable multivibrator is 54.86 kHz then its period is 1.82 s.
Options- A. True
- B. False Discuss
- 6. An open feedback resistor in an inverting or noninverting op-amp circuit can cause severe clipping of the output signal.
Options- A. True
- B. False Discuss
- 7. An S-R flip-flop is an example of a bistable multivibrator circuit.
Options- A. True
- B. False Discuss
- 8. The frequency of a crystal is dependent on how much voltage is applied to activate it.
Options- A. True
- B. False Discuss
- 9. If the two inputs to a differential amplifier are exactly the same, then the output is the signal multiplied by two.
Options- A. True
- B. False Discuss
- 10. If an input signal is applied to the inverting input of an op-amp with the noninverting input grounded, the output signal would be opposite in polarity with the input.
Options- A. True
- B. False Discuss
Operational Amplifiers problems
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