Question

Calculate the number of electron that could flow per second through the Cross section of a wire when 4 A current flow it

Answer 1

Answer:

Answer is 2.5 × 10¹⁹ electrons

Explanation:

given:

4 A of current flows through the wire.

charge flowing per second , Q = 4 C    ( since I = Q/t )

we know that,

Q = n e  

where n = no . of electrons

and      e = charge of electron ( 1.6 × 10⁻¹⁹ C )

so, the number of electron that could flow per second through the Cross section of a wire when 4 A current flows through it is,

n = 4 / 1.6 × 10⁻¹⁹

n = 2.5 × 10¹⁹  electrons.