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A uniform magnetic field of induction B is confined to a cylindrical region of radius R. The magnetic field is increasing at a constant rate of dBdt (tesla/second). An electron of charge q, placed at the point P on the periphery of the field experiences an acceleration.

                      

1. BV2+1r towards left               

2. 12eRmdBdt towards right

3. eRmdBdt towards left                     

4. zero