Answer:
1.11×10¹⁹ electrons
Explanation:
The formula for electric energy is given as,
E = QV ................. Equation 1
Where E = Electric Energy, Q = charge, V = Voltage.
Make Q the subject of the equation
Q = E/V............... Equation 2
Given: E = 8 W, V = 4.5 V.
Substitute into equation 2
Q = 8/4.5
Q = 1.778 C
using,
n = Q/e............ Equation 3
Where n = number of electron, e = Charge of one electron.
Given: e = 1.6×10⁻¹⁹ C
Substitute into equation 3
n = 1.778/1.6×10⁻¹⁹
n = 1.11×10¹⁹ electrons
The number of electrons that should be pass through the bulb fi-la-ment per second is 3.5*10^18.
Since the voltage = 4.5 V
And, the resistance is = 8.0 W
So here we apply the ohm law
V = iR
i = V/R
= 4.5/8
= 0.56
Now t = 1 seconds
So, i = q/t
q/t = 0.56
q = 0.56 C
Now the electrons should be
= 0.56/1.6*10^-19
= 3.5*10^18
Learn more about electron here: https://brainly.com/question/24401678
