10. Number of electrons in 1 Coulomb charge is _________ a) 6.25*1021 b) 6.25*1020 c) 6.25*1025 d) 6.25*1023
Answer: a Explanation: Electron has the charge of 1.602*10-19 Coulomb. So, the number of electrons in 1 Coulomb of charge is 11.602∗10−19 = 6.25*1021. This huge number of electrons can be accumulated to form 1C of charge. Thus, we can conclude that we need Avogadro’s number of electrons (approximately) to get 100C charges.
