Teaching UP PGT Mock Test Series 2024 Electronic Devices Optical Devices Electron-Hole Pair Generation
Which of the following statements are correct:
A. In semiconductor diodes carriers are generated by photo-excitation.
B. When the photo diode is illuminated with light with energy (E) > Energy gap (Eg) of the semiconductor, then electron-hole pairs are generated.
C. Photovoltaic devices convert electricity into optical radiation.
D. Photodiode can be used as a photodetector to detect optical signal
E. Zener diode specification should be taken as per the required output voltage.
Choose the correct answer from the following options given below:
1
A, B and C only
2
B, C and E only
3
A, B, D and E only
4
A, C and D only