A) 3
B) 4
C) 5
D) 6
Correct Answer: C
Solution :
\[E=\frac{13.6{{Z}^{2}}}{{{n}^{2}}};\] According to question, \[\frac{13.6{{Z}^{2}}}{4}-\frac{13.6{{Z}^{2}}}{9}=47.2\Rightarrow 13.6{{Z}^{2}}\left( \frac{5}{36} \right)=47.2\] \[\Rightarrow \] \[{{Z}^{2}}=25\Rightarrow Z=5\]You need to login to perform this action.
You will be redirected in
3 sec