A current of 88.9 mA exists in a metal wire. How many electrons flow past a given crosssection of the wire in 9.12 min? The fundamental charge is 1.602 × 10−19 C. Answer in units of electrons.

current flows in a wire

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach

no. bullets are macro objects. wave nature is for light waves, extremely tiny particles. if a light particle was the size of your finger, the bullet would be the size of the universe. so basically, that huge difference in size makes the wave nature of matter insignificant.