JEE Main 2019 — Physics solution | Fundamenthol

JEE Main2019Physics

Q.

A particle of mass m moves in a circular orbit in a central potential field $U (r) \frac{1}{2} k r^{2}$ . If Bohr’s quantization conditions are applied, radii of possible orbitals and energy levels vary with quantum number n as

A
$r_{n} \propto n, E_{n} \propto n$
B
$r_{n} \propto n, E_{n} \propto n$
C
$r_{n} \propto n, E_{n} \propto \frac{1}{n}$
D
$r_{n} \propto n^{2}, E_{n} \propto \frac{1}{n ^{2}}$

Solution

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