An electron gun fires individual charges at a time, a negative charge is fired by speed V, moving parallel to a very long wire carrying a steady current I as shown. discover the magnitude and direction of the B field at the position of the charge, indicate what force, if any, the charge experiences an instant after it has been fired in the vicinity of the wire, appraise the results for a current I= 5A, d= 10cm V= 300m/s