Q. TRIAC (Triode alternating current) is unipolar device.

View solution

Q. How many layers of semiconductor does a TRIAC (Triode alternating current) have?

View solution

Q. What is the full form of SCR?

View solution

Q. A TRIAC (Triode alternating current) cannot perform switching action on DC voltage.

View solution

Q. Who developed the first Light emitting diode?

View solution

Q. Who was/were awarded with noble prize in physics in the year 2014 for the invention of blue light emitting diodes?

View solution

Q. Which alloy is used for green blue and white LED’s?

View solution

Q. Which alloy is used for red, orange and yellow LED’s?

View solution

Q. Recombination of charge carriers in an LED, releases some energy which comes out in the form of light.

View solution

Q. Opto-isolator uses a source of light for transmission, most commonly “near infrared light emitting diodes”.

View solution

Q. LASER stands for ____

View solution

Q. Which is a type of Opto-isolator?

View solution

Q. Optical isolator is also called as ________

View solution

Q. Which electromagnetic rays is emitted GaAs LED’s ?

View solution

Q. Who is known as the father of fibre optics?

View solution

Q. Which layer is just present above core that protects the light from going outside?

View solution

Q. Which layer is just present above cladding that protects the optical fibre from physical damage?

View solution

Q. What is the working principle of optical fiber?

View solution

Q. The critical angle in total internal reflection depends on the colour of the incident light.

View solution