Question

$E_n=-\frac{313.6}{n^2}$, if the value of $E_i=-34.84$ to which value '$n$' corresponds:

• A. $2$
• B. $4$
• C. $1$
• D. $3$

Answer 1

Answer: (D)

$3$

Solution:- (D) $3$

$E_n=-\frac{313.6}{n^2}$

For $E_i=-34.84;n=?$

$-34.84=-\frac{313.6}{n^2}$

$\Rightarrow n=\sqrt{\frac{313.6}{34.84}}=3$

Hence the value of $n$ is $3$.