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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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Topics: Dual Nature of Matter and Radiation
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The electric current in AC circuit is given by the relation i-3 sinωt+4 cos ωt.
- An object of mass 3kg is at rest. Now a force F=6t² i⃗+4t j⃗ is applied on the object
- The ratio of specific heats Cp/Cv=γ in terms of degrees of freedom (n) is given by
- The magnetic susceptibility is negative for
- If the half-life of a material is 10 yr, then in what time, it becomes 1/4th part
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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