Does the beginning of a electrical circuit.....?

Question

Does the beginning of a electrical circuit always has be negatively charged?

Answer 1

I don't get your question, however, Electrons flow from the Negative pole to the Positive one, Unlike Electric Current itself, it flows on the opposite side.

Answer 2

An electrical circuit doesn't have a beginning or ending. It's a closed loop.

However, it is true that electrons flow out of the negatively-charged terminal of a battery, go around the circuit, then enter the positively-charged battery terminal. But then they go through the battery and around again and again.

Answer 3

Electrons make up the current that flows through an electronic circuit. Since they are negatively charged, current (real current) flows from negative to positive. To simplify the understanding of circuits, convetional current is defined in the direction from positive to negative.

Answer 4

Depends what you mean by 'the beginning', but assuming you mean a DC circuit then yes. Conventionally it's the reverse in diagrams, but the electron flow is -ve to +ve. A potential difference is simply the difference in voltage across any given component.

It all goes a bit wierd when you start on AC circuits as the -ve and +ve ends are effectively the same when you're drawing it out.

Answer 5

"Imaginary" is just a name. There's nothing unnatural or unreal about them. An imaginary number is a combination of a magnitude and a phase. The point is it's a way to look at an AC source as having a constant voltage. We conventionally say that a 10V peak AC source is 10V*e^(jw). The imaginary term is entered in because we imagine a constant 10 volts is being rotated through the complex plane; the part of the voltage we see is the projection of that 10V onto the real axis at any instant. One way of writing complex numbers is with a real and imaginary part: a + jb (or a + bi if you're not in EE. But people who aren't in EE are losers). If you're worried about the philosophical justification, it might be better to look at a complex number as a combination of a magnitude and a phase: rather than (3 + j4), you might say 5 @ angle 53 degrees: it's a phasor of length 5 angled at 53 degrees from the real axis.

Answer 6

It's worth noting that most sources teach conventional current (current flows from + to -), and that though USUALLY electricity is the flow of electrons, in P type semiconductors, electricity is in the flow of holes from + to -, and in ice electricity is a flow of positive charge carriers from + to -.

Answer 7

No, not at all. A difference of voltage is all that is required, direction of electron flow, or hole flow for that matter, is as desired.