Q25.When photons of wavelength λ1 are incident on an isolated sphere, the corresponding stopping potential is found to be V . When photons of wavelength λ2 are used, the corresponding stopping potential was thrice that of the above value. If light of wavelength λ3 is used then find the stopping potential for this case: (1) hc + 1 − + 1 − λ2 λ1 2λ2 λ1 e [ λ31 1 ] (2) hce [ λ31 1 ] (3) hc − 1 − + 1 − λ2 λ1 e [ λ31 1 ] (4) hce [ λ31 3 ] 2λ2 2λ1
What This Question Tests
This question requires the application of Einstein's photoelectric equation multiple times to relate stopping potential with incident wavelength and work function.
Concepts Tested
Formulas Used
eV_s = hc/λ - φ
📚 NCERT Sections This Tests
11.9 — Light Of Wavelength 488 Nm Is Produced By An Argon Laser Which Is
Physics Class 12 · Chapter 11
11.9 Light of wavelength 488 nm is produced by an argon laser which is used in the photoelectric effect. When light from this spectral line is incident on the emitter, the stopping (cut-off) potential of photoelectrons is 0.38 V. Find the work function of the material from which the emitter is made.
11.3 — The Photoelectric Cut-Off Voltage In A Certain Experiment Is 1.5 V.
Physics Class 12 · Chapter 11
11.3 The photoelectric cut-off voltage in a certain experiment is 1.5 V. What is the maximum kinetic energy of photoelectrons emitted?
11.2 — The Work Function Of Caesium Metal Is 2.14 Ev. When Light Of
Physics Class 12 · Chapter 11
11.2 The work function of caesium metal is 2.14 eV. When light of frequency 6 ×1014Hz is incident on the metal surface, photoemission of electrons occurs. What is the (a) maximum kinetic energy of the emitted electrons, (b) Stopping potential, and (c) maximum speed of the emitted photoelectrons?
📋 Question Details
- Chapter
- Dual Nature of Matter
- Topic
- Photoelectric effect and stopping potential
- Year
- 2016
- Shift
- 09 Apr Online
- Q Number
- Q25
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 11: Dual Nature of Matter
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