Question

The conductor carries a current of 3ma. The number of electrons passing through it in 1 minute is about

Answer 1

I =q/t

where,

I=3× 10^-3

q=no.of electron(n)×chargeonelectron(e)

q=n×1.6×10^-19

t=60 second

I=q/t

q=It

ne=It

n=It/e

n=((3×10^-3)×60)/1.6×10^-19

n=1.125×10^18 Ans.

I hope you will understand

Answer 2

The number of electrons passing through a conductor in 1 minute is $1.12\times 10^{18}\ electrons$.

Explanation:

It is given that,

Current in the conductor, $I=3\ mA=3\times 10^{-3}\ A$

To find,

The number of electrons passing through it in 1 minute or 60 seconds.

Solution,

The electric current is defined as the number of charges flowing through a conductor per second. It is given by :

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

According to quantisation of electric charges, q = ne

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

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

$n=\dfrac{3\times 10^{-3}\times 60}{1.6\times 10^{-19}}$

$n=1.12\times 10^{18}\ electrons$

So, the number of electrons passing through a conductor in 1 minute is $1.12\times 10^{18}\ electrons$. Hence, this is the required solution.

Learn more,

Electric current

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