Q. In a non-inverting amplifier configuration, what is the relationship between the input voltage and the output voltage?
-
A.
Vout = Vin
-
B.
Vout = Vin/2
-
C.
Vout = 2Vin
-
D.
Vout = Vin + 1
Solution
In a non-inverting amplifier, the output voltage is equal to the input voltage multiplied by the gain, which can be greater than 1.
Correct Answer:
C
— Vout = 2Vin
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Q. In a summing amplifier configuration, how is the output voltage related to multiple input voltages?
-
A.
Vout = Vin1 + Vin2
-
B.
Vout = Vin1 - Vin2
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C.
Vout = (Vin1 + Vin2)/2
-
D.
Vout = - (Vin1 + Vin2)
Solution
In a summing amplifier, the output voltage is the negative sum of the input voltages, scaled by the feedback resistor.
Correct Answer:
D
— Vout = - (Vin1 + Vin2)
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Q. In an inverting amplifier configuration, if the feedback resistor is 10 kOhm and the input resistor is 1 kOhm, what is the gain?
Solution
The gain of an inverting amplifier is given by -Rf/Rin, which in this case is -10 kOhm / 1 kOhm = -10.
Correct Answer:
A
— -10
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Q. In an inverting amplifier configuration, if the feedback resistor is 10kΩ and the input resistor is 1kΩ, what is the gain?
Solution
The gain of an inverting amplifier is given by -Rf/Rin, which in this case is -10kΩ/1kΩ = -10.
Correct Answer:
A
— -10
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Q. What is the effect of increasing the frequency on the gain of an operational amplifier?
-
A.
Gain increases
-
B.
Gain decreases
-
C.
Gain remains constant
-
D.
Gain becomes zero
Solution
As frequency increases, the gain of an operational amplifier typically decreases due to bandwidth limitations.
Correct Answer:
B
— Gain decreases
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Q. What is the ideal open-loop gain of an operational amplifier?
-
A.
1
-
B.
100
-
C.
1000
-
D.
Infinity
Solution
The ideal open-loop gain of an operational amplifier is considered to be infinity.
Correct Answer:
D
— Infinity
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Q. What is the output voltage of a voltage follower configuration when the input voltage is 5V?
-
A.
0V
-
B.
2.5V
-
C.
5V
-
D.
10V
Solution
In a voltage follower configuration, the output voltage equals the input voltage, so it is 5V.
Correct Answer:
C
— 5V
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Q. What is the primary function of a differential amplifier?
-
A.
Amplify a single input
-
B.
Amplify the difference between two inputs
-
C.
Filter noise
-
D.
Rectify signals
Solution
A differential amplifier amplifies the difference between two input voltages.
Correct Answer:
B
— Amplify the difference between two inputs
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Q. What is the purpose of negative feedback in an operational amplifier circuit?
-
A.
Increase gain
-
B.
Stabilize gain
-
C.
Reduce bandwidth
-
D.
Increase distortion
Solution
Negative feedback is used to stabilize the gain of an operational amplifier and improve linearity.
Correct Answer:
B
— Stabilize gain
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Q. What is the typical input impedance of an ideal operational amplifier?
-
A.
0 Ohms
-
B.
1 kOhm
-
C.
1 MOhm
-
D.
Infinity
Solution
An ideal operational amplifier has infinite input impedance, meaning it draws no current from the input source.
Correct Answer:
D
— Infinity
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Q. What is the typical output impedance of an ideal operational amplifier?
-
A.
0 Ohms
-
B.
1 kOhm
-
C.
1 MOhm
-
D.
Infinity
Solution
An ideal operational amplifier has zero output impedance, allowing it to drive loads without voltage drop.
Correct Answer:
A
— 0 Ohms
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Q. Which terminal of an operational amplifier is typically used as the inverting input?
-
A.
Non-inverting terminal
-
B.
Inverting terminal
-
C.
Output terminal
-
D.
Power supply terminal
Solution
The inverting terminal is the one where the input signal is applied for inverting configurations.
Correct Answer:
B
— Inverting terminal
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