(A) Optical fibre
(B) Transistor
(C) Decoder
(D) Photo diode
Answer: (D) Photo diode
Q. LED generates light with the help of charge carriers, it converts:
(A) Electrical enery into light energy
(B) Light energy in to electrical energy
(C) Electrons in to light
(D) None of these
Answer: (A) Electrical energy in to light energy
Q. What is “LED” stands for?
(A) Light emitting display
(B) Light emitting diode
(C) Low energy display
(D) None of these
Answer: (B) Light emitting diode