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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
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A current of 2 A is made to flow through a coil which has only one turn. The magnetic
- Two conducting spheres of radii 5 cm and 10 cm are given a charge of 15 μC each.
- When the temperature increases, the viscocity of
- A point charge is kept at the centre of a metallic insulated spherical shell. Then
- Potentiometer measures the potential difference more accurately than a voltmeter
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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