Verified Solution • 2025–26 Session moderate

QPages 363-364: Q9: HC Verma: Concepts of Physics - Volume 2 Photoelectric Effect and Wave-Particle Duality Pages 363-364: Q9 Solution: If the frequency of light in a photoelectric experiment is…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often treat the stopping potential as directly proportional to frequency ($V_s\propto f$) and forget the constant work‑function term ($\phi$) in $eV_s=h f-\phi$, leading them to answer that $V_s$ simply doubles when $f$ doubles.

If the frequency of light in a photoelectric experiment is doubled, the stopping potential will _______.

Multiple Choice Options

  • A be doubled
  • B be halved
  • C become more than double
  • D become less than double

Step-by-Step Verified Solution

**Answer:** (c) become more than double. **Step-by-Step Explanation:** eV_s = h_ - _. If _ is doubled, V_s = (2h_ - _)/e, which is more than double the original V_s.

All Questions in this Chapter

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