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4. Moving charges and magnetism — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics4. Moving charges and magnetism1 Mark
MCQ
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
  • ✓
    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

Correct option: A.
electric field of constant magnitude and varying direction
a
(a)

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.

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