Opto-Isolator device consists of the following device/devices _______.

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URSC (ISRO) Technician B: Electronic Mechanic Previous Year Paper (Held on 24 March 2019)
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  1. Diodes and resistors
  2. Amplifiers and Capacitors 
  3. LEDs and photo-diodes 
  4. Laser diodes and LEDs

Answer (Detailed Solution Below)

Option 3 : LEDs and photo-diodes 
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RRB JE EE Power Systems 1 6

  • An optocoupler (also called an opto-isolator, photocoupler, or optical isolator) is an electronic component that transfers electrical signals between two isolated circuits by using light.
  • Opto-isolators prevent high voltages from affecting the system receiving the signal.

26 June 1

There are many different types of optocouplers are available based on their needs and switching capabilities. Depending on the use there are mainly four types of optocouplers are available.

  • Opto-coupler which use Photo Transistor
  • Opto-coupler which use Photo Darlington Transistor
  • Opto-coupler which use Photo TRIAC
  • Opto-coupler which use Photo SCR
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