In terms of Bohr radius a0, the radius of the second Bohr

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In terms of Bohr radius a₀, the radius of the second Bohr orbit of a hydrogen atom is given by

1. 4 a₀
2. 8 a₀
3. √2a₀
4. 2 a₀

Correct Option: A

As r ∝ n² therefore, radius of 2nd Bohr’s orbit = 4 a₀.