Topic: Electronic Devices
Which of the following is NOT true about opto-couplers?
- A. It is a solid state device to isolate two parts of a circuit
- B. It can act as an input device or output device but not both
- C. Combines a Light Emitting Diode and a Photo Transistor in a single package
- D. it prevents electrical noise or voltage transients of one circuit from integrating with other circuit
Answer: B. It can act as an input device or output device but not both
Explanation: An optocoupler transfers electrical signals between two isolated circuits using light. It typically combines an LED and a phototransistor in one package, isolating noise and transients. The claim that it can only act as an input or output but not both in complex configurations is incorrect, marking (b) as the false statement.