Q27.The stopping potential Vo (in volt) as a function of frequency ( 𝑣) for a sodium emitter, is shown in the figure. The work function of sodium, form the data plotted in the figure, will be: JEE Main 2019 (12 Apr Shift 1) JEE Main Previous Year Paper (Given: Planck’s constant h = 6.63 × 10-34 J s , electron charge ( e ) = 1.6 × 10-19 C) (1) 2.12 eV (2) 1.82 eV (3) 1.95 eV (4) 1.66 eV
What This Question Tests
The question requires interpreting a graph of stopping potential vs. frequency to determine the work function of the material using Einstein's photoelectric equation.
Concepts Tested
Formulas Used
eV₀ = hν - φ₀
📚 NCERT Sections This Tests
11.5 — In An Experiment On Photoelectric Effect, The Slope Of The Cut-Off Voltage
Physics Class 12 · Chapter 11
11.5 In an experiment on photoelectric effect, the slope of the cut-off voltage versus frequency of incident light is found to be 4.12 × 10–15 V s. Calculate the value of Planck’s constant.
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.
11.2 — 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
- 2019
- Shift
- 12 Apr Shift 1
- Q Number
- Q27
- Type
- Graph based
- NCERT Ref
- Class 12 Physics Ch 11: Dual Nature of Radiation and Matter
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