operational-amplifiers electronics question and answers -Page 8

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Operational Amplifiers problems

1. Changing the input voltage to an op-amp circuit will change its voltage gain.
Options
A. True
B. False

Correct Answer: False

2. A virtual ground is a ground for current, but not for voltage.
Options
A. True
B. False

Correct Answer: False

3. Current actually flows into or out of a virtual ground.
Options
A. True
B. False

Correct Answer: False

4. 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

Correct Answer: True

5. An S-R flip-flop is an example of a bistable multivibrator circuit.
Options
A. True
B. False

Correct Answer: True

6. The frequency of a crystal is dependent on how much voltage is applied to activate it.
Options
A. True
B. False

Correct Answer: False

7. 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

Correct Answer: False

8. 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

Correct Answer: True

9. A monostable multivibrator must be triggered.
Options
A. True
B. False

Correct Answer: True

10. The difference between the upper and lower trigger points is called the Schmitt trigger.
Options
A. True
B. False

Correct Answer: False

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