Question

A current of 1.6 ampere is flowing in a conductor.The number of electrons flowing per second through the conductor is

Answer 1

Answer:

Explanation:

Current(I)=charge(Q)/time(t)

In question, it is given that current is 1.6mA I.e 1.6*10^-3A

As it is asking about number of electrons per second that is charge flowing per second that is Current.

And we know Q=ne

So, I=Q/t

1.6*10^-3=1.6*10-19n/t

-> n/t(electrons per second)= 10^16.

So 10^16 electrons will pass through the cross section per second

Answer 2

Given,

Current (I) = 1.6A

Time (t) = 1 second

To Find,

The number of electrons (ne) flowing per second through the conductor.

Solution,

As we know, the current is defined as the rate of flow of charged element,

⇒ I = $\frac{Q}{t}$

Hence the charge flown is,

⇒ Q = I × t

⇒ Q = 1.6 × 1

⇒ Q = 1.6C

The charge Q is due to electrons, therefore,

⇒ Q = ne

The electronic charge of value is 1.6 × 10^-19

⇒ 1.6 = n × 1.6 × 10^-19

⇒ n = 16 × 10^-19 / 1.6

⇒ n = 10 × 10^-19

Hence,  the number of electrons flowing per second through the conductor is 10 × 10^-19.