Electrons used in an electron microscope are accelerated by a voltage of 25 kV

⇦

⇨

Electrons used in an electron microscope are accelerated by a voltage of 25 kV. If the voltage is increased associated to 100 kV then the de-Broglie wavelength associated with the electrons would

Options

(a) increase by 2 times
(b) decrease by 2 times
(c) decrease by 4 times
(d) increase by 4 times

Correct Answer:

decrease by 2 times

Explanation:

λ ∞ 1/√V
λ₁ / λ₂ = √ V₂ / V₁ = √ 1000keV / 25 keV = 2
λ₂ = λ₁ / 2

Related Questions:

1. In a region, the potential is represented by V(x,y,z)=6x-8xy-8y+6yz, where V
2. If in a p-n junction, a square input signal of 10 V is applied as shown, then the output
3. The fossil bone has a ¹⁴C:¹²C ratio, which is [1/16] of that in a living animal
4. Two spherical bodies of mass M and 5 M and radii R and 2 R released in free space
5. The angle of incidence at which reflected light is totally polarised for refraction

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