Time taken for an electron to complete one revolution in the Bohr orbit of hydrogen atom is
- A$\frac{4\pi^2 m r^2}{nh}$
- B$\frac{nh}{4\pi^2 mr}$
- C$\frac{nh}{4\pi^2 m r^2}$
- D$\frac{h}{2\pi mr}$
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