What determines the nature of the path followed by the particle

What determines the nature of path followed by the particle?

A charged particle enters the uniform electric field normally.What will be the nature of the path followed by the particle?

A charged particle moves at right angles to the magnetic field. What is the nature of the path followed by the particle?

A cahrged particle is released from rest in a region of steady and uniform electric and magnetic and magnetic fields, which are parallel to each other what will be the nature of the path followed by the charged particle?

A charged particle is released from rest in a re gion of steady and uniform electric and magnetic fields, which are parallel to each other. What will be the nature of the path followed by the charged particle? Explain your answer.