JEE Main 2010
- Exam
- JEE Main
- Year
- 2010
- Subject
- Physics
- Chapter
- Dual Nature of Matter
JEE Main 2010 · Physics · Dual Nature of Matter
Statement-1 : When ultraviolet light is incident on a photocell,...
Statement-1 : When ultraviolet light is incident on a photocell, its stopping potential is and the maximum kinetic energy of the photoelectrons is . When the ultraviolet light is replaced by rays, both and increase.
Statement-2 : Photoelectrons are emitted with speeds ranging from zero to a maximum value because of the range of frequencies present in the incident light.
Of the four choices given after the statements, choose the one that best describes the two statements.
Options
- AStatement-1 is true, Statement-2 is true; Statement-2 is the correct explanation of Statement-1.
- BStatement-1 is true, Statement-2 is true; Statement-2 is not the correct explanation of Statement- 1.
- CStatement-1 is false, Statement-2 is true.
- DStatement-1 is true, Statement- 2 is false.
Correct answer
D. Statement-1 is true, Statement- 2 is false.
Step-by-step solution
Since the frequency of ultraviolet light is less than the frequency of -rays, the energy of each incident photon will be more for X-rays
Stopping potential is to stop the fastest photoelectron
E_{\max }