CBSE 2026 · Region 4 · Set 1 · Q10 · 1 mark
The kinetic energy of a charged particle is increased to four times of its initial value. The de Broglie wavelength associated with the particle will :
Official answer
From CBSE’s own marking scheme for this paper.
(D)
decrease by $\displaystyle 50$% of its initial value.
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CBSE Class 12 Physics past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.