Question

The charge on an electron is known to be 1.6 x 10-19 coulomb. In a circuit the current flowing is 1 A. How many electrons will be flowing through the circuit in a second?

Answer 1

q = ne
t = 1 sec
I = 1 A
e = 1.6×10⁻¹⁹ C

and, current, I = q/t
⇒1 A = ne/1
⇒n×( 1.6×10⁻¹⁹) = 1
⇒n = 1/(1.6×10⁻¹⁹)
      =6.25 ×10¹⁸ 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 .