A) \[{{\left[ \frac{10.2(eV)}{m} \right]}^{1/2}}\]
B) \[{{\left[ \frac{40.8(eV)}{m} \right]}^{1/2}}\]
C) \[{{\left[ \frac{20.4(eV)}{m} \right]}^{1/2}}\]
D) \[{{\left[ \frac{40.8(eV)}{1.0078\,m} \right]}^{1/2}}\]
Correct Answer: B
Solution :
\[mu=2mv\] \[v=u/2\] \[\Delta E=\frac{1}{2}\,m{{u}^{2}}\,-\frac{1}{2}2m\,\times {{v}^{2}}=\frac{1}{4}m{{u}^{2}}\] \[=3.4\,-(-13.6\,)eV=10.2\,eV\] \[\frac{1}{4}m{{u}^{2}}\,=10.2eV\] \[u=\,{{\left[ \frac{40.8(eV)\,}{m} \right]}^{1/2}}\]
You need to login to perform this action.
You will be redirected in
3 sec
