A) \[17.6\times {{10}^{16}}\]
B) \[14.5\times {{10}^{12}}\]
C) \[1.76\times {{10}^{15}}\]
D) \[1.45\times {{10}^{15}}\]
Correct Answer: C
Solution :
From formula, Kinetic energy of charged particle \[\frac{1}{2}m{{v}^{2}}=qV\] Charge of electron q = e \[\therefore \] \[\frac{1}{2}m{{v}^{2}}=eV\] or, \[\left( \frac{e}{m} \right)=\frac{{{v}^{2}}}{2\,V}\] \[=\frac{{{(8.4\times {{10}^{8}})}^{2}}}{2\times 200}=1.76\times {{10}^{15}}.\]
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