Question

Що покаже амперметр, якщо через нього за 10 хвилин пройшов заряд 18 Кл? Скільки електронів пройде за одиницю часу через опір провідника, щоб включений у коло амперметр показав 1 мА?

Answer 1

№1

t=10 хвилин=600 секунд

q=18 Кл

I=q/t=18 Кл÷600 с=0,03 А=30 мА

№2

I=1 мА=10⁻³ А

t=1 c

e=1.6*10⁻¹⁹ Кл це елементарний заряд, величина постийна

N=q/e=It/e=10⁻³ А×1 с÷(1,6*10⁻¹⁹ Кл)=6,25*10¹⁶

Answer 2

To answer your question, let's break it down into two parts:

1. What will the ammeter show if a charge of 18 C passes through it in 10 minutes? 2. How many electrons will pass through a conductor per unit time to make the ammeter show 1 mA?

1. What will the ammeter show if a charge of 18 C passes through it in 10 minutes?

An ammeter measures electric current, which is the rate of flow of electric charge. The unit of electric charge is the Coulomb (C), and the unit of time is seconds (s). To determine what the ammeter will show, we need to convert the time from minutes to seconds.

Given: - Charge (Q) = 18 C - Time (t) = 10 minutes

To convert minutes to seconds, we multiply by 60 (since there are 60 seconds in a minute): 10 minutes * 60 seconds/minute = 600 seconds

Now, we can calculate the current (I) using the formula: I = Q/t

Substituting the values: I = 18 C / 600 s = 0.03 A

Therefore, the ammeter will show a current of 0.03 Amperes (A) when a charge of 18 Coulombs passes through it in 10 minutes.

2. How many electrons will pass through a conductor per unit time to make the ammeter show 1 mA?

To determine the number of electrons passing through a conductor per unit time, we need to use the relationship between current, charge, and the charge of an electron.

Given: - Current (I) = 1 mA = 0.001 A

The charge of an electron is approximately 1.6 x 10^-19 C.

To find the number of electrons passing through the conductor per unit time, we can use the formula: Number of electrons (n) = I / (charge of an electron)

Substituting the values: n = 0.001 A / (1.6 x 10^-19 C)

Calculating this, we find that approximately 6.25 x 10^15 electrons will pass through the conductor per unit time to make the ammeter show 1 mA.

In summary: 1. The ammeter will show a current of 0.03 A when a charge of 18 C passes through it in 10 minutes. 2. Approximately 6.25 x 10^15 electrons will pass through the conductor per unit time to make the ammeter show 1 mA.