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Hard X-rays for the study of fractures in bones should have a minimum wavelength of 10⁻¹¹ m. The accelerating voltage for electrons in X-ray machine should be
Options
(a) <124.2 kV
(b) >12.4 KV
(c) between 60 kV and 70 kV
(d) (=100 kV)
Correct Answer:
>12.4 KV
Explanation:
Minimum Wavelength λ = hc / eV = (1.242 × 10⁻⁶) / V
V = (1.242 × 10⁻⁶) / 10⁻¹¹ = 124.2 kV
The accelerating voltage for electron in X-ray is 124.2 kV
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The horizontal and vertical components of earth’s magnetic field at a place
- The primary and secondary coil of the transformer have 50 and 1500 turns respectively
- An electric dipole is placed at an angle 30°with an electric field intensity 2×10⁵N/C.
- If two bodies are projected at 30⁰ and 60⁰ respectively with the same velocity, then
- In nuclear fusion, two nuclei come together to form a large nucleus.
Topics: Dual Nature of Matter and Radiation (150)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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