A proton accelerated through a potential difference V has a de Broglie wavelength λ. On doubling the accelerating potential, the de Broglie wavelength of the proton_____.
Fill in the blank with the correct answer from the options given below

Updated On: Oct 30, 2024

Remains unchanged
Becomes double
Becomes four times
Decreases

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The Correct Option is D

Solution and Explanation

The de Broglie wavelength λ is inversely proportional to the square root of its kinetic energy (λ ∝ 1/√V). When the accelerating potential is doubled, the kinetic energy increases, and the wavelength decreases by a factor of √2. Hence, the correct answer is Option 4.

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Questions Asked in CUET exam

Read the following passage and answer the next five questions based on it.
Aldehydes are generally more reactive than ketones in nucleophilic addition reactions due to steric and electronic reasons. Sterically, the presence of two large groups in ketones hinders the attack of nucleophile to carbonyl carbon than in aldehydes. Electronically, aldehydes are more reactive than ketones because two alkyl groups reduce the electrophilicity of the carbonyl carbon more effectively than in the former
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Match List-I with List-II:

List-I	List-II
(A) Mn²⁺	(I) Pyrolusite ore
(B) Spin only Magnetic Moment	(II) An alloy of 4f metal, iron and traces of S, C, Al and Ca
(C) MnO₂	(III) μ_s = √n(n + 2) BM
(D) Misch metal	(IV) Highest oxidation states

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