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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
- The coefficient of friction between the tyres and the road is 0.25. The maximum speed
- A rectangular copper coil is placed in a uniform magnetic field of induction 40 mT
- A coil of 40 henry inductance is connected in series with a resistance of 8 ohm
- A scooter is going round a circular road of radius 100 m at a speed of 10m/s
- A body starts from rest, what is the ratio of the distance travelled by the body
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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