| ⇦ | 
| ⇨ |
A particle of mass 1mg has the same wavelength as an electron moving with a velocity of 3 x 10⁶ ms⁻¹. The velocity of the particle is: (mass of electron = 9.1 x 10⁻³¹ kg)
Options
(a) 2.7 x 10⁻¹⁸ ms⁻¹
(b) 9 x 10⁻² ms⁻¹
(c) 3 x 10⁻³¹ ms⁻¹
(d) 2.7 x 10⁻²¹ ms⁻¹
Correct Answer:
2.7 x 10⁻²¹ ms⁻¹
Explanation:
Wavelength of particle (λ₁)
= h/mv = h / (1 x 10⁻³) x v
where v is the velocity of the particle. Wavelength of electron
(λ₂) = h / (9.1 x 10⁻³¹) x (3 x 10⁶)
But λ₁ = λ₂
h / (1 x 10⁻³) x v = h / (9.1 x 10⁻³¹) x (3 x 10⁶)
v = (9.1 x 10⁻³¹) x (3 x 10⁶) / 10⁻³
= 2.7 x 10⁻²¹ ms⁻¹
Related Questions: - Two spheres of mass m and M are situated in air and the gravitational force
- A pan is suspended from a steel wire. Weights are slowly put on the pan
- Surface tension of a solution is 30 x 10⁻² N/m. The radius of the soap bubble is 5 cm
- If a solid ball of metal has a concentric spherical cavity with in it if the ball
- Heat is not being exchanged in a body. If its internal energy is increased, then
Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two spheres of mass m and M are situated in air and the gravitational force
- A pan is suspended from a steel wire. Weights are slowly put on the pan
- Surface tension of a solution is 30 x 10⁻² N/m. The radius of the soap bubble is 5 cm
- If a solid ball of metal has a concentric spherical cavity with in it if the ball
- Heat is not being exchanged in a body. If its internal energy is increased, then
Topics: Dual Nature of Matter and Radiation (150)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply