Question

How many electrons flow through an electric bulb every second, if the current that passes through the bulbs is 1.6 A.

Answer 1

Given: an electric bulb

To find the number of electrons flowing through an electric bulb every second, if the current that passes through the bulbs is $1.6A$

Solution:

Use the relation,

$I=\frac{Q}{t}=\frac{ne}{t}$, where $n$ =number of electrons and $e$ = charge on 1 electron and $t$ = time

Using thevallues given in the question we can write,

$1.6A=\frac{n\times e}{1sec}$

$⟹n=\frac{1.6}{1.6\times {10}^{-19}}$ [$\because$ charge on 1 electron = $1.6\times {10}^{-19}C$]

$n={10}^{19}$

are the required number of electrons.