Pathfinder Modern Physics MCQ 10, 11 & 12
0#IIT #JEE #KVPY #Olympiad
A narrow beam of monochromatic light of wavelength lambda emitted from source of power P is propagation in the positive x-direction. After being reflected from a perfectly reflecting plane mirror of area vector A = A(-i+j), the beam falls on a metal plate of surface area A place parallel to the x-z plane. Work function of the metal is phi and photoelectric efficiency is n. Photoelectrons emitted from the metal plate are immediately removed from the vicinity of the plate.
Q. 10) Reflection from the mirror changes momentum of photons and exerts force on the mirror. Which of the following statements is/are correct ?
Q. 11) After time interval delta t from the instant light falls on the metal plate, electric field at a point very close to the metal plate and far away from its edges is explored. Which of the following statements is/are true
Q. 12) If power of the source, wavelength of light, surface area and photoelectric efficiency of the metal of the plate are adjusted to 60 W, 6000 A, 0.04 m2 and 10-4 respectively. Which of the following statements are correct ?
Other Videos By Santosh Sir IITK (Apex Physics)
| 2021-10-16 | Pathfinder Impulse & Momentum MCQ 3 |
| 2021-10-15 | Pathfinder Impulse & Momentum MCQ 2 |
| 2021-10-15 | Pathfinder Impulse & Momentum MCQ 1 |
| 2021-10-14 | JEE Adv Paper 2 3S22 10102021 |
| 2021-10-14 | 11 Oct 2021 JEE Adv Test 3S23 Part 2 |
| 2021-10-13 | 11 Oct 2021 JEE Adv Test 3S23 |
| 2021-10-12 | Pathfinder Magnetism BYU Q. 21 |
| 2021-10-12 | 10 Oct JEE Adv Paper 1 Solution |
| 2021-10-12 | Pathfinder Magnetism BYU Q. 20 |
| 2021-10-12 | Pathfinder Magnetism BYU Q.19 |
| 2021-10-11 | Pathfinder Modern Physics MCQ 10, 11 & 12 |
| 2021-10-11 | Pathfinder Modern Physics MCQ 9 |
| 2021-10-11 | Pathfinder Modern Physics MCQ 8 |
| 2021-10-10 | Pathfinder Modern Physics MCQ 6 |
| 2021-10-10 | Pathfinder Modern Physics MCQ 5 |
| 2021-10-10 | Pathfinder Modern Physics MCQ 3 |
| 2021-10-09 | Pathfinder Modern Physics MCQ 2 |
| 2021-10-09 | Pathfinder Modern Physics MCQ 1 |
| 2021-10-09 | Pathfinder Properties of Matter MCQ 4 |
| 2021-10-08 | Pathfinder Properties of Matter MCQ 3 |
| 2021-10-08 | Pathfinder Properties of Matter MCQ 2 |