Physics · 2019
JEE Main · 12 January 2019, Shift 1 · Q25
A particle A of mass ' m' and charge ' q' is accelerated by a potential difference of 50 V. Another particle B of mass '4 m' and charge 'q' is…
A particle A of mass ' m' and charge ' q' is accelerated by a potential difference of $\displaystyle 50$ V. Another particle B of mass '$\displaystyle 4$ m' and charge 'q' is accelerated by a potential difference of $\displaystyle 2500$ V. The ratio of de-Broglie
wavelengths $\displaystyle \frac{\lambda_{\mathrm{A}}}{\lambda_{\mathrm{B}}}$ is close to :
Official answer
(4)
$\displaystyle 14.14$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.