answer plz...................
an electric current of 1 A is passing through a cross section of the coil in 1 second .How many electrons are involved in providing a current of 1 A? the charge on 1 electron is 1.602×10^_19 C
Answers
Q = 1⋅1 = 1C
We know that the charge of 1 electron has the magnitude 1.6 x 10^(-19) C. Therefore we are looking for the solution to this equation
Number of electrons x 1.6 x 10 − 19 = 1C
= 6.25 x 1018
As-salamu alaykum!
One ampere of current is flowing when one coulomb of electrons passes through the material in one second.
⇒ if we know how many electrons make up a coulomb we can easily define how many electrons are providing a current of 1 A.
we know that electric charge of an electron is = -1.6 × 10⁻¹⁹ Coulomb.
⇒ 1 Coulomb = (e)/(-1.6 × 10⁻¹⁹) = -6.25 × 10¹⁸ electrons.
negative sign denotes that the charge on electron is negative
⇒ one dozen contains 12 items
⇒ in the similar way one coulomb contains 6.25 × 10¹⁸ electrons
but one ampere is one coulomb of electrons passing in one second
⇒ one ampere of current is flowing when 6.25 × 10¹⁸ electrons are passing through the material in one second. (It is indeed a huge rush of electrons!. . .can't imagine the electron's traffic problems)