question_answer 10)

If a current of 0.5 ampere flows through a metallic wire for 2 hours, then how many electrons flow through the wire?  

Answer:

Q (coulombs) = I (ampere) x t (sec) = (0 .5 ampere) x (2 x 60 x 60 s) = 3600 C A flow of IF, i.e., 96500 C is equivalent to the flow of 1 mole of electrons, i.e., 6.022 x 1023 electrons. 3600 C is equivalent to the flow of electrons  electrons.