. A positively charged thin metal ring of radius R is fixed in the xy plane its centre at the origin 0.Anegatively charged particle Pis released from rest at the point (0, 0, z0) where z0> 0. Then the motion of P is (a) periodic, for all values of z0, satisfying 0 0(b) simple harmonic, for all values of zo satisfying 0 0≤ R(c) approximately simple harmonic, provided z0(d) such that P crosses O and continues to move along the negative z axis towards z = - ∞

Radhika Batra , 10 Years ago

Grade 11