CUET · PHYSICS · PYQ PAPER 2023
1. An electron of mass m is moving with kinetic energy k and momentum p. The de-Broglie wavelength associated will be :
(A) \( \lambda = \frac{\sqrt{2mk}}{p} \)
(B) \( \lambda = \frac{p}{h} \)
(C) \( \lambda = \frac{h}{p} \)
(D) \( \lambda = \frac{h}{\sqrt{2mk}} \)
Choose the correct answer from the options given below :
- A (A) and (C) only
- B (B) and (D) only
- C (C) and (D) only
- D (A) and (D) only
Answer & Solution
Correct Answer
(C) (C) and (D) only
Step-by-step Solution
Detailed explanation
\( \lambda = \frac{h}{p} \) \( k = \frac{p^2}{2m} \Rightarrow p = \sqrt{2mk} \) \( \lambda = \frac{h}{\sqrt{2mk}} \) Options (C) and (D) are correct.
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