Directions for: The questions consist of two statements each, printed as assertion and reason. While answering these questions you are required to choose any one of the following five responses A. If both the Assertion and the Reason are true and the Reason is a correct explanation of the Assertion. B. If both the Assertion and the Reason are true but the Reason is not a correct explanation of Assertion. C. If the Assertion is true but the Reason is false. D. If both the Assertion and the Reason are false. E. If Assertion is false but Reason is true.
Assertion: K and Cs are used in photo-electric cells. Reason: K and Cs emit electrons on exposure to light.A) A
B) B
C) C
D) D
E) E
Correct Answer: A
Solution :
K and Cs are used in photoelectric cells as they easily emit electrons when radiations fall on them due to low work function.
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