question_answer

If an electron revolves in the path of a circle of radius of \[0.5\times {{10}^{-10}}m\]at a frequency of \[5\times {{10}^{15}}\] cycle/sec. The electric current in the circle is: (Charge of an electron is\[1.6\times {{10}^{-19}}C\])

A)  0.4 mA                                

B)  0.8 mA

C)  1.2 mA                                

D)  1.6 mA