I have question that both conductors n insulators have randomly moving electrons in it so why when we touch a lonely left iron doesn't produce current to us. Why?????

randomly moving electrons have no specific direction of motion to constitute a current(current is flow in a direction).

or u can say that random motion of 2 electrons opposite to each other cancels the effect.

electrons just move zig-zagly in all direction due to collisions bt by applying potential diff it exerts force on them to move in specific direction(this is also not staright-it is also zi-zag type(due to collisions) bt heading forwards)

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