Physics · 2015
JEE Main · 10 April 2015, Shift 1 · Q27
de-Broglie wavelength of an electron accelerated by a voltage of 50 V is close to (| e |=1.6 × 10^-19 C, m_e =9.1 × 10^-31 kg., h =6.6 × 10^-34 Js ):
de-Broglie wavelength of an electron accelerated by a voltage of $\displaystyle 50$ V is close to $\displaystyle \left(|\mathrm{e}|=1.6 \times 10^{-19} \mathrm{C}, \mathrm{m}_{\mathrm{e}}=9.1 \times 10^{-31} \mathrm{~kg}\right.$, $\displaystyle \mathrm{h}=6.6 \times 10^{-34} \mathrm{Js}$ ) :
Official answer
(3)
$\displaystyle 1.7 \AA$
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JEE Main 2015 Physics question, with the answer from NTA’s final answer key. Where our answers come from.