A charged particle moves in a uniform magnetic field. The velocity of the particle at some instant makes an acute angle with the magnetic field. The path of the particle will be

If path of the particle is a circle , then the angle between velocity and magnetic field is always ${90}^0.$

If the particle is projected making an acute or obtuse  angle with the magnetic field , then the pathe will be an helix of uniform radius and pitch and in this case the angle between the velocity vector and the acceleration vector will always be acute .