Question

plz solve itand give me the answer​

Answer 1

Answer:

Correct Option is :

( 3). 6.25 × 10^15

Explanation:

Refer the attached picture.

• Here, t = 1 second.

Answer 2

Answer:

Given:

Current of 1 mA is flowing in a Copper wire.

To find:

Number of electrons passing through a particular point of the conductor per second .

Concept:

Current is defined as the rate of flow of charges. By rate , it is meant the number of charge carrying particles passing through a particular cross-section of the conductor in unit time.

Mathematically it can be represented :

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \boxed{ \red{ \huge{ \sf{i = \frac{q}{t} }}}}$

Calculation:

Putting all the available data :

Let number of electrons be n , and electron charge be e

$\therefore \: i = \dfrac{q}{t}$

$= > {10}^{ - 3} = \dfrac{n \times e}{1}$

$= > n = \dfrac{ {10}^{ - 3} }{e}$

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

$= > n = 0.625 \times {10}^{16}$

$= > n = 6.25 \times {10}^{15} electrons$

So final answer :

$\boxed{ \sf{ \green{ \large{ \bold{ n = 6.25 \times {10}^{15} electrons}}}}}$