The angle at which the particle enters the magnetic field is changed from 45 degrees to 60 degrees. How will the pitch of the path be affected?

It will increase. It will decrease. It will become 3 times. Cannot be predicted.

It will decrease.

It will decrease. Pitch : p = 2πmv Cos θ/qB Cos 45 = 1/\(\sqrt {2 }\) = 0.71 Cos 60 = 1/2 = 0.5