de-Broglie wavelength of an electron accelerated by a voltage of 50 V is close to [JEE ONLINE 10-04-2015] |
\[(|e|=1.6\times {{10}^{-19}}C,\]\[{{m}_{e}}=9.1\times {{10}^{-31}}kg,\] \[h=6.6\times {{10}^{-34}}Js)\] |
A) \[0.5{\AA}\]
B) \[1.7{\AA}\]
C) \[2.4{\AA}\]
D) \[1.2{\AA}\]
Correct Answer: B
Solution :
[b] momentum and |
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