Question

If one ampere current flows through a conductor, the number of electrons flowing across the section of the conductor in 2 seconds is

Answer 1

in one ampere of current there are 6.25×10^18 electrons flowing through the given cross section per second so in two seconds there will be
6.25×10^18×2=12.50×10^18 electrons

Answer 2

$1.25\times 10^{19}$ electrons are flowing across the section of the conductor in 2 seconds.

Explanation:

It is given that,

Current in the conductor, I = 1 A

Time, t = 2 s

To find,

The number of electrons flowing across the section of the conductor.

Solution,

Electric current is defined as the charge flowing through a conductor per unit time. It is given by :

$I=\dfrac{q}{t}$

Also, q = ne

$I=\dfrac{ne}{t}$

$n=\dfrac{It}{e}$

e is the charge on electron

$n=\dfrac{1\times 2}{1.6\times 10^{-19}}$

$n=1.25\times 10^{19}\ electrons$

So, $1.25\times 10^{19}$ electrons are flowing across the section of the conductor in 2 seconds.

Learn more,

Electric current

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