Question

Choose the incorrect relation on the basis of Bohr’s theory.

• A. Velocity of electron $\propto \frac{1}{n}$
• B. Frequency of revolution $\propto \frac{1}{n^3}$
• C. Radius of orbit $\propto n^{2}Z$
• D. Force on electron $\propto \frac{1}{n^4}$

Answer 1

The correct option is C Radius of orbit $\propto n^{2}Z$

On the basis of Bohr's theory,

$velocity\propto \frac{1}{n}$

$radius\propto \frac{n^2}{Z}$

$force\propto \frac{1}{n^4}$

$frequency=\frac{1}{Timeperiod}=\frac{v}{2\pi r}\propto \frac{1}{n^3}$

Option (C) shows the incorrect relation.