Inductor

An inductor is a

Inductor

Water analogy

7:35 continue research in https://www.youtube.com/watch?app=desktop&v=KSylo01n5FY&t=0s

An inductor works as current goes through, the wire makes a magnetic field aroud it, shown by placing 4 compasses around it. Negative current flowing in the wire makes the compass turn in a direction to align to the magnetic field and positive current also makes them reverse in direction to align.

Inductors hate change and tries to keep the same.

As current rises, they try to stop it via an opposing force. If current reduces, they try to stop it by pushing electrons out, to try and keep it as the same prior.

Water analogy

[2] Thinking of water flowing in a tube (represented wires of a circuit) with a pump (represented as battery) pumping the water. The tube divides into 2 branches, one having a reducer (resistor) to make water to flow through harder. Branch (wire) 2 has a water wheel (an inductor) pushed into spinning by water going through. But the wheel is heavy so it takes time to spin.

Turning the wire into a coil (a inductor coil [1.1]), each section makes their own magnetic field before fusing their field into a single stronger and bigger magnetic field.

A magnetic field is shown by putting iron powder on a magnet which shows the flux lines.

Note: All the current flows shown are much faster in real life.

Analogy

The actual circuit

As the water accumulates more resistance to push the heavy wheel, leading water to take the other branch and return to the pump. Overtime, the water goes throught the wheel (inductor) and the wheel faster, so fast it can't slow down due to inertia, causing water to go through much faster through its path than the inductor's path--the wheel loses all most of its resistance

Turning off the pump makes the water flow around the wheel and reducer's branch (instead back to the pump), for enough water to stop the wheel and the water flow.

It's like a circuit with a lamp and an inductor in parallel

(It's the same circuit as this circuit wired differently.)

The circuit's initial flow is slower in the inductor and prefers entering the bulb, lighting up. Like the water analogy, overtime the inductor's resistance reduces for more current to flow and the current accumulate until it loses most of its inductance, turning off the light (Fig. 1).

Fig. 1

Disconnecting the circuit the indcutor proceeds to push the electrons into the bulb til the resistance returns.

But since inductors hate changes, reconnecting the circuit, the current flow rises that the inductor tries to oppose it by creating a counter-electromagnetive force or back emf [1.2].