Test Index

CBSE Class 12 Physics 2017 Outside Delhi Set 2 Paper

© examsnet.com
Question : 7 of 9
Marks: +1, -0
(a) In the following diagram, which bulb out of B1B_1 and B2B_2 will glow and why?
(b) Draw a diagram of an illuminated pp-n junction solar cell.
(c) Explain briefly the three processes due to which generation of emf takes place in a solar cell.
Solution:  
(a) Identification of the bulb and reason
(b) Diagram of solar cell
(c) Names of the processes
(a) Bulb B1B_1 glows
Diode D1D_1 is forward biased.
(b) Diagram
(c) Generation: Incident light generates electron-hole pairs.
Separation: Electric field of the depletion layer separates the electrons and holes.
Collection: Electrons and holes are collected at the nn and pp side contacts.
© examsnet.com
Go to Question:
Prev Question
Next Question