# A charged particle q is moving in the presence of a magnetic field B which is inclined to an angle 30° with the direction of the motion of the particle. Draw the trajectory followed by the particle in the presence of the field and explain how the particle describes this path.

The force acting on a charged particle in a magnetic field is given by ; $\vec{F}=q(\vec{V}\times \vec{B})$

Where q = charge of the particle

v = velocity of particle and

B = magnetic field in that region

Let velocity has a component along with B, this component remains unchanged as the motion along the magnetic field will not be affected by the magnetic field.

The motion in a plane perpendicular to B is circular one, thereby producing a helical motion. Thus the described path will be helical as shown in the figure.

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