If $E$ and $L$ denote the magnitudes of total energy and of angular momentum of electron in Bohr orbit then…
If $E$ and $L$ denote the magnitudes of total energy and of angular momentum of electron in Bohr orbit then the true relation between them is
$L \propto \frac{1}{\sqrt{E}}$
$E \propto \frac{1}{L}$
$E \propto L$
$L \propto \sqrt{E}$
Solution
According to Bohr's theory, for the $n^{\text {th }}$ orbit total energy is given by
$E \propto \frac{1}{n^2}$
and the angular momentum is given by
$L \propto n$
$\therefore L \propto \frac{1}{\sqrt{E}}$
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