Question

A charged particle initially at rest at O,when released follows a trajectory as shown alongside. Such a trajectory is possible in the presence of

(a) electric field of constant magnitude and varying direction

(b) magnetic field of constant magnitude and varying direction

(c) electric field of constant magnitude and constant direction

(d) electric and magnetic fields of constant magnitudes and constant directions which are parallel to each other

Answer 1

Answer is : (a) electric field of constant magnitude and varying direction

As particle is initially at rest, so to move the charged particle an electric field is required.

As path of particle is a curve, so direction of electric field must be changing with distance.