Electric Circuits

What is the fundamental definition of electric current?

A cylindrical aluminum wire has a radius of $1 \text{ mm}$ and carries a current of $3 \text{ A}$. The number of free electrons per cubic meter in aluminum is $6.0 \times 10^{28}$. What is the drift velocity of the electrons?

A silver wire has a mass density of $10.5 \times 10^{3} \text{ kg/m}^3$ and an atomic mass of $107.87 \text{ g/mol}$. Assuming one free electron per atom, and given that the wire carries a current density $J = 1.0 \times 10^{6} \text{ A/m}^2$, what is the drift velocity of the electrons?

A conductor has 30 C of charge pass through a fixed point in 6 seconds. What is the current in the conductor?

A circuit has a current of 200 mA. How long will it take for 24 Coulombs of charge to pass through the circuit?

In a circuit, how does the direction of conventional current relate to the direction of electron flow?

In a simple circuit with a battery and a resistor, what is the direction of the conventional current flow?

A copper wire carries a current of 10 A with a drift velocity of $7 \times 10^{-4} \text{ m/s}$. If the number of charge carriers per unit volume is $8.5 \times 10^{28} \text{ m}^{-3}$, what is the cross-sectional area of the wire?

A wire carries a current of 500 milliamperes. How much charge flows through the wire in 2 minutes?

A copper wire has a charge carrier density $n = 8.5 \times 10^{28} \text{ m}^{-3}$ and carries a current of 5 A. If the drift velocity of the electrons is $3.67 \times 10^{-4} \text{ m/s}$, and the charge of an electron is $1.6 \times 10^{-19} \text{ C}$, what is the cross-sectional area of the wire?