Question

Через лампу розжарення проходить струм 0,8 А. Скільки вільних електронів проходить через поперечний переріз волоска лампи за 1 секунду?

Answer 1

I=q/t

q=It

q=0.8*1=0.8 Кл

Answer 2

Calculation of the Number of Free Electrons Passing through the Cross-Section of the Lamp Filament in 1 Second

To calculate the number of free electrons passing through the cross-section of the lamp filament in 1 second, we need to know the charge carried by each electron and the time period.

Given: - Current passing through the lamp filament = 0.8 A (Amperes) - Time period = 1 second

To find the number of free electrons, we can use the formula:

Number of free electrons = (Current × Time) / Charge of an electron

The charge of an electron is a fundamental constant and is approximately equal to 1.6 × 10^-19 Coulombs.

Substituting the given values into the formula, we get:

Number of free electrons = (0.8 A × 1 s) / (1.6 × 10^-19 C)

Calculating this expression, we find:

Number of free electrons ≈ 5 × 10^18

Therefore, approximately 5 × 10^18 free electrons pass through the cross-section of the lamp filament in 1 second.

Please note that the above calculation assumes that the current passing through the lamp filament is constant and that there are no other factors affecting the flow of electrons.