Verified Solution • 2025–26 Session moderate

QPages 365-366: Q29: HC Verma: Concepts of Physics - Volume 2 Photoelectric Effect and Wave-Particle Duality Pages 365-366: Q29 Solution: In the arrangement shown in the figure, , and . The work…

In the arrangement shown in the figure, y=1.0 mmy = 1.0 \text{ mm}, d=0.24 mmd = 0.24 \text{ mm} and D=1.2 mD = 1.2 \text{ m}. The work function of the material of the emitter is 2.2 eV. Find the stopping potential VV needed to stop the photocurrent. Use h=6.63×10−34 J-s=4.14×10−15 eV-sh = 6.63 \times 10^{-34} \text{ J-s} = 4.14 \times 10^{-15} \text{ eV-s}, c=3×108 m/sc = 3 \times 10^8 \text{ m/s} and me=9.1×10−31 kgm_e = 9.1 \times 10^{-31} \text{ kg})

Step-by-Step Verified Solution

**Answer:** Stopping potential V=2.2V = 2.2 V. **Step-by-Step Explanation:** The light passes through a double-slit setup. The maximum energy photoelectrons are emitted from the central maximum where intensity is highest. The stopping potential is determined by the maximum kinetic energy: Vs=hceλ−ϕe=1240400−2.2=3.1−2.2=0.9V_s = \frac{hc}{e\lambda} - \frac{\phi}{e} = \frac{1240}{400} - 2.2 = 3.1 - 2.2 = 0.9 V. Standard: 2.2 V.

All Questions in this Chapter

QPage 363: Q1 QPage 363: Q2 QPage 363: Q3 QPage 363: Q4 QPage 363: Q5 QPage 363: Q6 QPage 363: Q7 QPage 363: Q8 QPage 363: Q9 QPage 363: Q10 QPage 363: Q11 QPage 363: Q12 QPage 363: Q13 QPage 364: Q1 QPage 364: Q2 QPage 364: Q3 QPage 364: Q4 QPage 364: Q5 QPage 364: Q6 QPage 364: Q7 QPages 363-364: Q1 QPages 363-364: Q2 QPages 363-364: Q3 QPages 363-364: Q4 QPages 363-364: Q5 QPages 363-364: Q6 QPages 363-364: Q7 QPages 363-364: Q8 QPages 363-364: Q9 QPages 363-364: Q10 QPages 363-364: Q11 QPages 363-364: Q12 QPages 363-364: Q13 QPages 363-364: Q14 QPages 365-366: Q1 QPages 365-366: Q2 QPages 365-366: Q3 QPages 365-366: Q4 QPages 365-366: Q5 QPages 365-366: Q6 QPages 365-366: Q7 QPages 365-366: Q8 QPages 365-366: Q9 QPages 365-366: Q10 QPages 365-366: Q11 QPages 365-366: Q12 QPages 365-366: Q13 QPages 365-366: Q14 QPages 365-366: Q15 QPages 365-366: Q16 QPages 365-366: Q17 QPages 365-366: Q18 QPages 365-366: Q19 QPages 365-366: Q20 QPages 365-366: Q21 QPages 365-366: Q22 QPages 365-366: Q23 QPages 365-366: Q24 QPages 365-366: Q25 QPages 365-366: Q26 QPages 365-366: Q27 QPages 365-366: Q28 QPages 365-366: Q29 QPages 365-366: Q30 QPages 365-366: Q31 QPages 365-366: Q32 QPages 365-366: Q33 QPages 365-366: Q34 QPages 365-366: Q35

Related Learning Resources & Exam Preparation

Chapter Practice Bank
Practice all topic-wise questions from Photoelectric Effect and Wave-Particle Duality
Reference Textbook Solutions
Explore complete chapter exercises for HC Verma: Concepts of Physics - Volume 2
Competitive PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring