An electron revolves along a circular path of radius 20 cm with constant angular velocity 120 rad `s^(-1)` about an axis passing through the centre and perpendicular to the plane of the circle. If the external magnetic field is absent, then the potential difference between the centre of the circle is (Mass of the electron `= 9.1 xx 10^(-31)` kg)

Options

A. `3.691 xx 10^(-9)V`
B. `1.738 xx 10^(-9)V`
C. `4.278 xx 10^(-9)V`
D. `2.347 xx 10^(-9)V`

Answer

B