Determine the total pulse of electrons in a straight wire 500 m long, through which a current of 20A flows.

Let’s write down briefly given:
L = 500 m;
I = 20 A.
To find:
total momentum of electrons in a straight wire.
Let’s start by recalling the formula for calculating the pulse rate.
So the momentum is:
p = m * v.
To calculate the charge passing through the conductor, we apply the formula:
q = I * t, where t = L / v.
Substitute and get the formula:
q = IL / v.
We express v:
v = IL / q,
where q = e = 1, 6 * 10 ^ -19 C (constant value).
Substitute v and get p = mIL / e
Substitute the values into the formula and find:
p = (9.1 * 10 ^ -31 * 20 * 500) / (1.6 * 10 ^ -19) = 5.7 * 10 ^ -8 (kg m / s ^ 2).