Phasor Diagram of Series RL Circuit 

Because it has magnitude and angle

Same question.😢

@@Cpp_For_Life I guess if R is less than one ohm it can happen. But I am trying to make sense of it too.

VL leads IL by 90 degrees because a coil of wire with electricity flowing through it generates a magnetic field. The act of generating the magnetic field at the moment that a given direct voltage is applied causes much initial impediment to current flow. After the magnetic field is built to 100% of possible intensity, there is no more impediment to current flow. So if there exists impediment to current flow, there is voltage across the coil. When there is no impediment to current flow, there is no voltage across the coil, and lots of current flow to support the magnetic field. Can you guess what happens if we suddenly disconnect the coil from that applied direct voltage?

There would be no current..

@@nesoacademy yeah, waiting for that, if possible, please upload it regularly

iota

"j" in electronics is the very same thing as the imaginary operator "i" in college algebra. "i" equals the square root of minus one, which is not on the real number line. If a number has "i" after it, it is on the imaginary number line, perpendicular to the real number line. If a number has "j" before it, it's the same thing, except electronics notation.

It's iota only but we are representing it with "j" alphabet just so you don't get confused if it is current(i) or iota(i).