An electron of mass 9.1 x 10${}^{-31}$ kg moves with a speed of 2.0 x 10${}^6$ ms${}^{-1}$ round the nucleus of an atom in a Circular path of radius 6.1 x 10(^{11}\) m. Determine the angular speed of the electron.

A. 3.28 x 10${}^{16}$ rad s${}^{-1}$  
B. 8.55 x 10${}^3$ rad s${}^{-1}$
C. 9.11 x 10${}^{13}$ rad s${}^{-1}$
D. 5.22 x 10${}^{15}$ rad s${}^{-1}$

Show Answer Show Explanation

Correct Answer: A