an insulating ring of radius R, is rolled uniformly along the ceiling of room with constant velocity v0. A charged bead of mass m , charge qis placed over the ring . Entire system is moving in a uniform magnetic field as shown in figure.The bead moes along with ring without any contact force from ring(theta not equal to 90 degree).
Choose the correct statements:
1) The centripital force on bead from frame of refrence of centre of mass of ring is qv0B
2)mgnetic field B mg/qv0
3) radius of ring=mv0/qB
4)tangential acceleration of bead=qv0Bcos(theta)/qB