Question 1

What is the primary purpose of an operational amplifier in electronic circuits?

Accepted Answer

To amplify voltage signals

Answer

To switch high voltages

Answer

To convert AC to DC

Answer

To filter signals

Question 2

In a differential amplifier configuration, what is the function of the resistors used in the feedback loop?

Accepted Answer

To set the gain of the amplifier

Answer

To filter noise

Answer

To decrease output impedance

Answer

To increase input impedance

Question 3

What is the typical input impedance of an ideal operational amplifier?

Accepted Answer

Infinite

Answer

Moderate

Answer

Zero

Answer

Low

Question 4

Which of the following characteristics is NOT associated with an ideal operational amplifier?

Accepted Answer

Finite output impedance

Answer

Infinite bandwidth

Answer

Infinite open-loop gain

Answer

Zero common-mode gain

Question 5

In an inverting op-amp configuration, how is the output voltage related to the input voltage?

Accepted Answer

The output voltage is the negative product of the input voltage and the gain

Answer

The output voltage is equal to the input voltage

Answer

The output voltage is the positive product of the input voltage and the gain

Answer

The output voltage is twice the input voltage

Question 6

What component is essential for the functioning of a differential amplifier?

Accepted Answer

Transistors or operational amplifiers

Answer

Only resistors

Answer

Capacitors

Answer

Inductors

Question 7

The common-mode rejection ratio is

Accepted Answer

often expresses in decibels

Answer

equal to the common-mode voltage gain

Answer

equal to the voltage gain

Answer

Question 8

What is the output voltage of an ideal operational amplifier when the inputs are equal?

Accepted Answer

0 V

Answer

1 V

Answer

Negative infinity

Answer

Positive infinity

Question 9

Decreasing the gain in the given circuit figure below could be achieved by

Accepted Answer

increasing the value of the feedback resistor

Answer

reducing the amplitude of the input voltage

Answer

removing the feedback resistor

Answer

increasing the value of the input resistor

Question 10

In an ideal operational amplifier, what happens if the input voltage difference is zero?

Accepted Answer

The output voltage will also be zero

Answer

The output will oscillate indefinitely

Answer

The output will saturate at the negative supply voltage

Answer

The output will saturate at the positive supply voltage

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