Practice Questions
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What is the primary characteristic of an operational amplifier (op-amp) in an open-loop configuration, specifically regarding its gain?
An op-amp without feedback is designed to magnify the tiny difference between its two input pins by a huge amount. Other options are incorrect because...
In an inverting amplifier configuration, how does the power supply rejection ratio (PSRR) impact the output signal when the supply voltage fluctuates?
PSRR shows how well the amplifier can ignore changes in its supply voltage. Other options are incorrect because Some think supply changes never affect...
Which internal component of an operational amplifier (op-amp) is primarily responsible for increasing the input signal's amplitude before it reaches the output stage?
The gain stage is the first internal part of an op‑amp that receives the tiny input voltage. Other options are incorrect because A common mistake is t...
In a non-inverting amplifier configuration using an operational amplifier, how does the common-mode rejection ratio (CMRR) influence the performance of a voltage follower circuit?
CMRR tells the op amp how well it can ignore signals that are common to both inputs. Other options are incorrect because Low CMRR does not make the ou...
Which of the following statements correctly describes the relationship between input impedance, slew rate, and power supply rejection ratio (PSRR) in operational amplifiers (op-amps)?
A high slew rate means the output can change very quickly. Other options are incorrect because Higher input impedance does not make the amplifier swit...
In an operational amplifier, the output voltage is determined by the difference between the two input voltages multiplied by the ________ of the op-amp.
The output follows the rule Vout = (V+ - V-) × Gain. Other options are incorrect because Bandwidth tells how wide a range of frequencies the op-amp ca...
Imagine you are designing a basic audio amplifier using an operational amplifier (op-amp). You need to know how the internal components, specifically the transistors, contribute to the amplification of the audio signal. Which of the following statements best describes the role of the transistors in the op-amp in this context?
Transistors inside an op‑amp act like tiny power boosters. Other options are incorrect because People often think a transistor just copies the input v...
Which of the following statements accurately describe the internal components and function of operational amplifiers (op-amps)? Select all that apply.
An op‑amp uses a chain of transistors to boost a tiny voltage into a larger one. Other options are incorrect because Some think the gain of an op‑amp ...
Arrange the following steps in the correct order for understanding the internal functioning of an operational amplifier (op-amp): A) Transistors amplify the input signal, B) The output signal is derived from the difference between the two inputs, C) Feedback mechanisms stabilize the gain, D) Op-amp is powered by a dual supply voltage.
First, transistors inside the op‑amp amplify the tiny input signal. Other options are incorrect because The misconception is that the output is formed...
Transistors in an op-amp:Amplification :: Resistors in a circuit:?
Resistors split the total voltage of a circuit in proportion to their resistance. Other options are incorrect because Resistors can limit current, but...
How do the internal transistor configurations in op-amps affect their gain and stability?
More transistors create additional amplification stages and feedback paths. Other options are incorrect because The misconception is that transistor c...
What is the primary function of an operational amplifier's internal transistors?
The transistors inside the op‑amp act like a chain of small switches that boost the voltage difference between the two input pins. Other options are i...
If an operational amplifier (op-amp) produces a very large output voltage when given a small difference between its inputs, what could be the underlying cause of this behavior?
An op‑amp is built with many transistors arranged so that a tiny voltage difference on its inputs is multiplied many times. Other options are incorrec...
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