Question

A current of 1A is drawn by a filament of an electric bulb for 10 minutes. Find the number of electrons that flows through the circuit

Answer 1

Answer:

The number of electron that flows through the circuit is 600

Step-by-step explanation:

we are given

current = 1 A

time = 10 min = 10 *60 sec = 600 sec

we have to find coulomb of charge so let it as x

and formula for this is

I = Q

T

now put values

1 A = x

600 sec

1A * 600 sec = x coulomb

600 coulomb ( or ampere/ sec )

in this circuit 600 electrons flows for 10 min in 1 Ampere current .

Answer 2

Answer:

A current of 1A is drawn by a filament of an electric bulb for 10 minutes, the number of electrons that flows through the circuit will be $3.75\times 10^{21}$

Step-by-step explanation:

• Let I be the current flowing through an electrical circuit t be the time of flow and Q be the total charge.  

        We have the expression for the total charge as,

        $Q = It$      ...(1)

        That is,

        $I = \frac{Q}{t}$      

        Then we have another expression for Q as,

         $Q = ne$  

           or

         $n=\frac{Q}{e}$   ...(2)

        Where n is the number of electrons and e is the charge of one electron.

        We can use these equations for solving the given question.

• From the question,

       Current, $I = 1 A$

       Time, $t = 10min = 10\times 60 = 600s$

       Charge on an electron, $e = 1.6\times 10^{-10} C$

        Then,

        Substituting the given values into equation (1)

        $Q = 1\times 600=600C$

        Now, Using equation(2),

        $n=\frac{600}{1.6\times 10^{-19}}=3.75\times 10^{21}$ electrons