AP EAMCET Medical 2016 Paper

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 differencebetween the centre of the circle and a point on the circumference of the circle is (Mass of the electron = 9.1 x 10−31 kg)