When two electrons enter into a magnetic field with different velocieis, they deflect in different circular paths, in such a way that the radius of one path is double that of the other. `1X10^(7)ms^(-1)` is the velocity of the electron in smaller of radius `2xx10^(3)m` . The velocity of electron in the other circular path is `:`

Options

A. `4xx10^(7)ms^(-1)`
B. `4xx10^(6)ms^(-1)`
C. `2xx10^(7)ms^(-1)`
D. `2xx10^(6)ms^(-1)`

Answer

3

Explanation

`v=(qBr)/(m)`