Modern Physics JEE Main | Photoelectric Effect Assertion

JEE MAIN 2025

29-01-2025 SHIFT-1

Question

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Emission of electrons in photoelectric effect can be suppressed by applying a sufficiently negative electron potential to the photoemissive substance.
Reason (R) : A negative electric potential, which stops the emission of electrons from the surface of a photoemissive substance, varies linearly with frequency of incident radiation.
In the light of the above statements, choose the most appropriate answer from the options given below :

Select the correct option:

(A) is true but (R) is false

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true but (R) is not the correct explanation of (A)

(A) is false but (R) is true

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

(A) : True
(B) : True but not correct explanation

Question Tags

JEE Main

Physics