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JEE Main20254 Apr 2025Morning ShiftPhysicsDual Nature of MatterActual

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A: In photoelectric effect, on increasing the intensity of incident light the stopping potential increases. Reason R : Increase in intensity of light increases the rate of photoelectrons emitted, provided the frequency of incident light is greater than threshold frequency. In the light of the above statement

Options

  1. ABoth A and R are true but R is NOT the correct explanation of A
  2. BA is false but R is true
  3. CA is true but R is false
  4. DBoth A and R are true and R is the correct explanation of A

Correct answer

B. A is false but R is true

Step-by-step solution

V _ S = hv - e so stopping potential doesn't depend on Intensity I = hv ~A On increasing intensity no. of photons per sec. n increases so the no. of electrons.

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