Operational Amplifier Test-3

1. Determine the output from the following circuit

• a) 180^o in phase with input signal

• b) 180^o out of phase with input signal

• c) Same as that of input signal

• d) Output signal cannot be determined

2. Which of the following electrical characteristics is not exhibited by an ideal op-amp?

• a) Infinite voltage gain

• b) Infinite bandwidth

• c) Infinite output resistance

• d) Infinite slew rate

3. An ideal op-amp requires infinite bandwidth because

• a) Signals can be amplified without attenuation

• b) Output common-mode noise voltage is zero

• c) Output voltage occurs simultaneously with input voltage changes

• d) Output can drive infinite number of device

4. Ideal op-amp has infinite voltage gain because

• a) To control the output voltage

• b) To obtain finite output voltage

• c) To receive zero noise output voltage

• d) None of the mentioned

5. Determine the output voltage from the following circuit diagram?

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• d) None of the mentioned

6. Find the output voltage of an ideal op-amp. If V₁ and V₂ are the two input voltages

• a) V_O= V₁-V₂

• b) V_O= A×(V₁-V₂)

• c) V_O= A×(V₁+V₂)

• d) V_O= V₁×V₂

7. How will be the output voltage obtained for an ideal op-amp?

• a) Amplifies the difference between the two input voltages

• b) Amplifies individual voltages input voltages

• c) Amplifies products of two input voltage

• d) None of the mentioned

8. The signal to an inverting terminal of an ideal op-amp is zero. Find the output voltage, if the other input voltage is

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• d) Data provided is insufficient

9. Which is not the ideal characteristic of an op-amp?

• a) Input Resistance –> 0

• b) Output impedance –> 0

• c) Bandwidth –> ∞

• d) Open loop voltage gain –> ∞

10. Which factor determine the output voltage of an op-amp?

• a) Positive saturation

• b) Negative saturation

• c) Both positive and negative saturation voltage

• d) Supply voltage