JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Topic Test - Structure of Atom (4-5-21)

What will be de-Broglie wavelength of an electron moving with a velocity of \[1.2\times {{10}^{5}}\,m{{s}^{-1}}\]

A) \[6.068\times {{10}^{-9}}\]

B) \[3.133\times {{10}^{-37}}\]

C) \[6.626\times {{10}^{-9}}\]

D) \[6.018\times {{10}^{-7}}\]

Correct Answer: C

Solution :

[c] \[\lambda =\frac{h}{p}\], \[p=mv\]

\[\lambda =\frac{h}{mv}\]\[=\frac{6.62\times {{10}^{-34}}}{9.1\times {{10}^{-31}}\times 1.2\times {{10}^{5}}}\]

\[\lambda =6.626\times {{10}^{-9}}m\].