explain how its path will be affected if the velocity V makes an angle theta with the direction of magnetic field
Hello Candidate,
If a charged particle enters a magnetic field, it will surely suffer some deflection due to to the magnetic properties and its electrical charge.
The charged particle enters perpendicular to the field, then it will pass out making a spherical part to the other end. If the particle makes any angle other than 90 degree, it will follow rather elliptical path while suffering the deflection in the magnetic field.
Have a good day. Hope it was helpful!!