An infinitely long wire carrying a current I in vertically upward direction (y-direction) is placed near the surface of earth as shown in figure. Neglect the earth'* magnetic field :
At some time t a particle is at point A(a, 0) and moving towards origin with velocity V. If the acceleration of particle at point A is 2g in downward direction then :
(A) particle is negatively charged
(B) particle is positively charged
(C) magnitude of charge on the particle is (πamg/μ0VI)
(D) magnitude of charge on the particle is (2πamg/μ0VI)
