A glass tube with a cross-sectional area of 8-2 m2 contains an ionizd gas. The densities are 1015 positive ions/m3 and 1011 free electrons/m3. Under the influence of an applied voltage, the postive ions are moving with an average axial velocity of 4 x 103 m/s. At that same point the axial velocity of the electrons is 2400 times as great. Calculate the electric current moving through the glass tube.

Answer in mA