Question

Question 23:
If the charge on an electron is 1.6 x 10-19 coulombs, how many electrons should pass through a conductor in 1 second to constitute 1 ampere current ?

Lakhmir Singh Physics Class 10

Answer 1

I = 1A , t = 1 sec , e = 1.6 × 10-19c , n = no. of electrons

n = It/e ( since Q = It )

= 1 × 1/1.6 × 10^-19
= 10/16 × 10^-19

= 5/8 × 10^19

= 0.625 × 10^19 electrons .

Answer 2

Answer:

Explanation:

Given :-

Current, I = 1 ampere

Charge, e = 1.6 × 10⁻¹⁹C

To Find :-

Number of electron, n =??

Formula to be used :-

I = ne

Solution :-

I = ne

n = I/e

n = 1/1.6 × 10⁻¹⁹C

n = 6.25 × 10⁻¹⁸  electrons.

Hence, Number of electron are 6.25 × 10⁻¹⁸ .