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If the momentum of electron is changed by P, then the de-Broglie wavelength associated with it changes by 0.5%. The initial momentum of electron will be:
Options
(a) 200 P
(b) 400 P
(c) P / 200
(d) 100 P
Correct Answer:
200 P
Explanation:
The de-Broglie’s wavelength associated with the moving of electron λ = h/P
Now, according to the problem
dλ / λ= – dp / P
0.5 / 100 = P / P’
P’ = 200 P
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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 tuning fork vibrates with 2 beats in 0.04 second. The frequency of the fork is
- The device can act as a complete electronic circuit is
- A black body at a temperature of 227⁰C radiates heat at a rate of 20 cal m⁻²s⁻¹.
- Two conducting spheres of radii 5 cm and 10 cm are given a charge of 15 μC each.
- An engine has an efficiency of 1/6. When the temperature of sink is reduced
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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