Question

Statement I- When the wavelength of incident radiation in a photoelectric experiment is decreased, then the stopping potential will decrease.
Statement II- In photoelectric effect, if the intensity of light is doubled, then the maximum kinetic energy of photoelectrons will become double.

• A. Statement I is true and statement II is false.
• B. Statement I is false and statement II is true.
• C. Both the statements are correct.
• D. Both the statements are incorrect.

Hint:

Maximum kinetic energy depends on the frequency of light and the work function, not on the intensity.

Answer 1

The Correct Option is D

Step 1: Check Statement I
$V_0 = \dfrac{hc}{e\lambda} - \dfrac{\phi}{e}$. When $\lambda$ decreases, $V_0$ increases, so Statement I is false.

Step 2: Check Statement II
$K_{max}$ has no dependence on intensity. Only the photocurrent depends on intensity, so Statement II is false.

Step 3: Conclusion
Since both are false, the option stating that both statements are incorrect is correct.

Final Answer:
Both statements fail, so the last option is correct. \[ \boxed{\text{(D) }\text{Both the statements are incorrect.}} \]