Question

A current of 5.0 A exists in a 10Ω resistor for 4.0 mn. How many (a) coulombs and (b) electrons pass through any cross section of the resistor in this time? (electrical charge of electron e = - 1.610-19C)

Answer 1

Current , i=tQ

or charge Q=it=5×(4×60)=1200C

Number of electrons n=eQ=1.6×10−191200=75×1020