CBSE Class 12 Physics 2017 Outside Delhi Set 2 Paper
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Question : 7 of 9
Marks:
+1,
-0
(a) In the following diagram, which bulb out of and will glow and why?
(b) Draw a diagram of an illuminated -n junction solar cell.
(c) Explain briefly the three processes due to which generation of emf takes place in a solar cell.
(b) Draw a diagram of an illuminated -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 glows
Diode 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 and side contacts.
(b) Diagram of solar cell
(c) Names of the processes
(a) Bulb glows
Diode 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 and side contacts.
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