Verified Solution • 2025–26 Session
moderate
QPages 393-394: Q7: HC Verma: Concepts of Physics - Volume 2 X-Rays Pages 393-394: Q7 Solution: Frequencies of X-rays of different materials are measured.…
⚠️ Common Exam Traps & Conceptual Pitfalls
Students frequently assume the Kα frequency varies linearly with atomic number ($\nu\propto Z$) and ignore the shielding constant and the square in Moseley's law ($\nu = R\,(Z-\sigma)^2$). Remember the relation is quadratic in $(Z-\sigma)$, so the correct plot is a parabola that starts near $Z=\sigma$, not a straight line.
Frequencies of X-rays of different materials are measured. Which one of the graphs in the figure may represent the relation between the frequency and the atomic number Z?
Multiple Choice Options
- A Graph a
- B Graph b
- C Graph c
- D Graph d
Step-by-Step Verified Solution
**Answer:** Graph a.
**Step-by-Step Explanation:**
Moseley's law: �_ _ (Z-b). So _ _ (Z-b)_, which is a parabola. Graph a represents this.
All Questions in this Chapter
QPage 393: Q1
QPage 393: Q2
QPage 393: Q3
QPage 393: Q4
QPage 393: Q5
QPage 393: Q6
QPage 393: Q7
QPage 393: Q8
QPage 393: Q9
QPage 393: Q10
QPages 393-394: Q1
QPages 393-394: Q2
QPages 393-394: Q3
QPages 393-394: Q4
QPages 393-394: Q5
QPages 393-394: Q6
QPages 393-394: Q7
QPages 393-394: Q8
QPages 393-394: Q9
QPages 393-394: Q10
QPages 393-394: Q11
QPages 393-394: Q12
QPages 393-394: Q13
QPages 393-394: Q14
QPages 394-395: Q1
QPages 394-395: Q2
QPages 394-395: Q3
QPages 394-395: Q4
QPages 394-395: Q5
QPages 394-395: Q6
QPages 394-395: Q7
QPages 394-395: Q8
QPages 395-396: Q1
QPages 395-396: Q2
QPages 395-396: Q3
QPages 395-396: Q4
QPages 395-396: Q5
QPages 395-396: Q6
QPages 395-396: Q7
QPages 395-396: Q8
QPages 395-396: Q9
QPages 395-396: Q10
QPages 395-396: Q11
QPages 395-396: Q12
QPages 395-396: Q13
QPages 395-396: Q14
QPages 395-396: Q15
QPages 395-396: Q16
QPages 395-396: Q17
QPages 395-396: Q18
QPages 395-396: Q19
QPages 395-396: Q20
QPages 395-396: Q21
QPages 395-396: Q22
QPages 395-396: Q23
QPages 395-396: Q24
QPages 395-396: Q25
QPages 395-396: Q26
QPages 395-396: Q27
Related Learning Resources & Exam Preparation
Chapter Practice Bank
Practice all topic-wise questions from X-Rays
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