MCQOPTIONS
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MCQOPTIONS
This section includes 2 Mcqs, each offering curated multiple-choice questions to sharpen your Physics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Calculate the kinetic energy of a photoelectron (in eV) emitted on shining light of wavelength 6.2 × 10-6 m on a metal surface. The work function of the metal is 0.1 eV. |
| A. | 10 eV |
| B. | 0.1 eV |
| C. | 0.01 eV |
| D. | 1000 eV |
| Answer» C. 0.01 eV | |
| 2. |
For a photosensitive surface, the work function is 3.3 × 10-19 J. Calculate the threshold frequency. |
| A. | 15 × 1014 Hz |
| B. | 25 × 1014 Hz |
| C. | 5 × 1014 Hz |
| D. | 55 × 1014 Hz |
| Answer» D. 55 × 1014 Hz | |