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K and Cs are used in photoelectric cells...

`K` and `Cs` are used in photoelectric cells.
`K` and `Cs` emit electrons on exposure to light.

A

if both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
A
K and Cs emit electrons on exposure to light hence, both are used in photoelectric cells. Here, assertion and reason are true and reason is a correct explanation.
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