KCET2008PhysicsCurrent Electricity
In the Bohr model of hydrogen atom, the electron is pictured to rotate in a circular orbit of radius 5 10⁻¹¹ ~m , at a speed 2.2 10⁶ ~m / s . What is the current associated with electron motion?
Options
- A1.12 ~mA
- B3 ~mA
- C0.75 ~mA
- D2.25 ~mA
Correct answer
A. 1.12 ~mA
Step-by-step solution
Frequency of revolution of electron, f = v 2 r = 2.2 10⁶ 2 (5 10⁻¹¹ ) =7.0 10¹⁵ ~Hz Current associated, i = qf aligned &= (1.6 10⁻¹⁹ ) (7.0 10¹⁵ ) &=11.2 10⁻⁴ ~A =1.12 ~mA aligned