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QPage 364: Q5: HC Verma: Concepts of Physics - Volume 2 Photoelectric Effect and Wave-Particle Duality Page 364: Q5 Solution: The photocurrent in an experiment on photoelectric effect…

⚠️ Common Exam Traps & Conceptual Pitfalls

Photocurrent is the rate of charge flow ($I= rac{dQ}{dt}$) at a given instant; it scales with the light intensity (power per unit area) because more photons per unit time produce more electrons. Increasing the exposure time only increases the total charge collected, not the instantaneous current. Students often mistake the two.

The photocurrent in an experiment on photoelectric effect increases if _______.

Multiple Choice Options

  • A the intensity of the source is increased
  • B the exposure time is increased
  • C the intensity of the source is decreased
  • D the exposure time is decreased

Step-by-Step Verified Solution

**Answer:** (a) the intensity of the source is increased. **Step-by-Step Explanation:** Photocurrent is proportional to intensity.

All Questions in this Chapter

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