A point charge `Q(=3xx10^(-12)C)` rotates uniformly in a vertical circle of radius R =1 mm.
Channel: Doubtnut
Date: 23/08/2020

A point charge `Q(=3xx10^(-12)C)` rotates uniformly in a vertical circle of radius R =1 mm. The axis of the circle is aligned along the magnetic axis of the earth. At what value of the angular speed `omega`, the effective magnetic field at the center of the circle will be reduced to zero ? (Horizontal component of Earth's magnetic field is 30 micro Tesla)