Question

Two equal positive charges q are fixed at point (a, 0) and (-a, 0) on x axis and opposite charge - q at rest is released from (0,a) on y-axis. The charge minus q will be

a.Move to infinity

b.Moved to origin and rest there

c.Under go shm about the origin

d.Execute oscillatory periodic motion but not shm

Answer 1

d.Execute oscillatory periodic motion but not shm

as it is sure that it is oscillatory but it is not a shm because for shm distance of oscillation should be small

Answer 2

d. execute oscillatory periodic motion and no shm

since for shm, the displacement ( in this case a) in the y axis should be less in comparison to the distance between the charges then only the conditions necessary for shm would be fulfilled ( a directly proportional to - x). But there is a force which brings the charge to mean position thus it undergoes oscillatory periodic motion