Question

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If there are 10'18 electrons flowing across any cross-section of a wire in 2 minutes, what is the current in
(Ans. 1.33 mA]
the wire? (Charge of the electron = 1.6x10-19 C).

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Answer 1

hey there

refer to attachment

Answer 2

The current in the wire is 1.33 mA.

Explanation:

It is given that,

Number of electron, $n=10^{18}\ electrons$

Time, t = 2 minutes = 120 seconds

We need to find the current flowing in the wire. It is given by the net charge flowing per unit time such that,

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

Since, q = ne

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

$I=\dfrac{10^{18}\times 1.6\times 10^{-19}}{120}$

I = 0.001333 A

or

I = 1.33 mA

So, the current in the wire is 1.33 mA. Hence, this is the required solution.

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