Two charge particle P & Q having same charge 1µC and mass 4µkg are initially kept at the distance of 1mm. Charge P is fixed, then the velocity of charge particle Q when the separation between them becomes 9 mm.
(1) 6 x 103 m/s
(2) 2 x 103 m/s
(3) 10 x 103 m/s
(4) 4 x 103 m/s
