Question

A current of 100 mA flows through a conductor. Find the number of electrons passing per second through the cross-section of the conductor, if the charge carried
by an electron is -1.6 x 10 to the power-19 C.​

Answer 1

Answer:

6.25 × 10¹⁷ electrons

Explanation:

From the definition of current:

• i = nQ/t

n = it/Q

= (100 × 10⁻³ A × 1 s) / (1.6 × 10⁻¹⁹ C)

= 0.625 × 10¹⁸

= 6.25 × 10¹⁷ electrons

Answer 2

$\huge{\underline{\underline{\mathfrak{Answer}}}$

i = nQ/t

n = it/Q

= (100 × 10⁻³ A × 1 s) / (1.6 × 10⁻¹⁹ C)

= 0.625 × 10¹⁸

= 6.25 × 10¹⁷ electrons