What is electrical current?

Electrical current

Electrical current is the flow rate of electrical charge or flow of electrons  in electric field, usually in electrical circuit.

The electrical current is measured in ampere (amp) unit.

Amp Denotes As=A

what is ampere?

An ampere is a unit of measure of the rate of electron flow or current in an electrical conductor. One ampere of current represents one coulomb of electrical charge (6.24 x 1018charge carriers) moving past a specific point in one second.

Current in series circuits:

Current that flows through resistors in series is equal in all resistors - just like water flow through a single pipe.

I_T = I₁ = I₂ = I₃ =...

I_T - the equivalent current in amps (A).

I₁ - current of load #1 in amps (A).

I₂ - current of load #2 in amps (A).

I₃ - current of load #3 in amps (A).

Current in parallel circuits:

Current that flows through loads in parallel - just like water flow through parallel pipes.

The total current I_Total is the sum of the parallel currents of each load:

I_T = I₁ + I₂ + I₃ +...

I_T - the equivalent current in amps (A).

I₁ - current of load #1 in amps (A).

I₂ - current of load #2 in amps (A).

I₃ - current of load #3 in amps (A).

Current measurement:

Current measurement is done by connecting the ammeter in series to the measured object, so all the measured current will flow through the ammeter.

The ammeter has very low resistance, so it almost does not affect the measured circuit.