Drift speed of electrons, when 1.5 A of current flows in a copper wire of cross section 5 mm2 , is v. If the electron density in copper is 9 x 1028/m3 the value of v in mm/s is close to (Take charge of electron to be = 1.6 x 10-19C )
(1) 0.2
(2) 3
(3) 2
(4) 0.02
