Question

Calculate the quantity of charges that flows through 10 seconds in a wire carrying 5 mill ampere. Calculate the number of electrons that pass through the cross section of the wire through the same time knowing that charge of an electrons 1.6x10⁻¹⁹ C.​

Answer 1

To calculate the quantity of charges and the number of electrons that flow through a wire in a given time, use the formulas Q = I * t and N = Q / e, respectively.

Step-by-step explanation:

To calculate the quantity of charges that flows through 10 seconds in a wire carrying 5 milliamperes, we can use the formula:

Q = I × t

Where Q is the charge, I is the current, and t is the time.

Substituting the values, we have:
Q = (5 × 10-3 A) × 10 s = 5 × 10-2 C

To calculate the number of electrons that pass through the cross section of the wire in the same time, we use the formula:

N = Q / e

Where N is the number of electrons, Q is the charge, and e is the charge of an electron.

Substituting the values, we have:
N = (5 × 10-2 C) / (1.6 × 10-19 C/electron) = 3.125 × 1017 electrons