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QPages 394-395: Q2: HC Verma: Concepts of Physics - Volume 2 X-Rays Pages 394-395: Q2 Solution: Cutoff wavelength of X-rays coming from a Coolidge tube depends …
⚠️ Common Exam Traps & Conceptual Pitfalls
Students often mix up the bremsstrahlung cutoff wavelength ($\lambda_{\min}=\frac{hc}{eV}$) with characteristic X‑ray lines, assuming the target material matters. Remember that the cutoff depends only on the accelerating voltage $V$, not on the target, filament‑target spacing, or filament temperature.
Cutoff wavelength of X-rays coming from a Coolidge tube depends on the
Multiple Choice Options
- A target material
- B accelerating voltage
- C separation between the target and the filament
- D temperature of the filament.
Step-by-Step Verified Solution
**Answer:** (b) accelerating voltage.
**Step-by-Step Explanation:**
Cutoff wavelength depends only on the accelerating voltage.
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