Question

. A current of 2.0 A flows in a circuit. How much charge passes a point in the circuit in TOS

Answer 1

Current in the circuit:

$I=\frac{\Delta q}{\Delta t};$

Charge per unit time:

$q=\Delta q=I\cdot t;$

Charge per one second:

$q=2A\cdot 1s=2 coulomb;$

Number of electrons per second:

$N=\frac{q}{e}=\frac{2}{1.6\cdot 10^{-19}}=125\cdot 10^{17};$