Consider the following statements regarding optocouplers: 1. Opt

Consider the following statements regarding optocouplers:

1. Optocouplers are LEDs driving photodiodes in a single package to provide electrical isolation between input and output

2. Optocoupler is an LED driving a phototransistor in a single package that replaces pulse transformers working at input zero crossing

3. Optocouplers are used as temporary non-fixed joints between optical fiber terminations.

Which of the above statements are correct?

A. 1, 2 and 3

B. 1 and 2 only

C. 1 and 3 only

D. 2 and 3 only

Please scroll down to see the correct answer and solution guide.

Opto-coupler:

Opto-coupler is an electronic component that transfers electrical signals between two isolated circuits by using light. It also called opto-isolator, photocoupler, or optical isolator. (Statement 1 is correct)
Opto-Isolator is a combination of LED and a photodiode in the same package. (Statement 2 is correct)
In low voltage or highly noise-sensitive circuits, the optocoupler is used to isolate circuitry to prevent electrical collision chances or to exclude unwanted noises.
Opto-isolators prevent high voltages from affecting the system receiving the signal.

Important Applications of Optocoupler:

To isolate low-voltage circuits from high voltages for smooth and control operation purposes.
Used for separation of AC and DC ground to protect control circuity or people from high voltage.
It is used in optical communication. Optocouplers are used as temporary non-fixed joints between optical fiber terminations.(Statement 3 is correct)
Used for the separation of the electric noise signal.