📚 Learning Guide
Negative Feedback in Op-Amps
medium

Negative feedback in op-amps is to stability as A: controlling the speed of a car is to ?

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Choose the Best Answer

A

Speed limit signs

B

Open throttle

C

Accelerating

D

Coasting downhill

Understanding the Answer

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Answer

Negative feedback in op‑amps is a technique that reduces the amplifier’s gain but makes its output predictable, just as a car’s speed control system limits acceleration to keep the vehicle from spinning out. Both methods trade raw power for steadiness: the op‑amp sacrifices some amplification to avoid oscillations, while a speed controller sacrifices maximum speed to keep the ride smooth. For example, if an amplifier is left unchecked it can oscillate wildly; adding feedback clamps its response so it settles quickly. Likewise, a speed‑limit governor prevents a car from exceeding safe speeds, keeping the driver and passengers secure. Thus, negative feedback is to stability what speed control is to safety.

Detailed Explanation

Road signs that set speed limits tell drivers how fast to go. Other options are incorrect because An open throttle lets the engine run freely, which can make the car accelerate too fast; Accelerating means the car keeps speeding up without limits.

Key Concepts

Negative Feedback
Stability in Control Systems
Operational Amplifiers
Topic

Negative Feedback in Op-Amps

Difficulty

medium level question

Cognitive Level

understand

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