I guess to add a Shakespearian flare, "...to supply or not supply, that is the question". In other words, is there a source of charged particles coming from the battery or not? This video seems to suggest that there are no electrons coming out of the battery.Dale said:
Electrons come out of the - terminal and go in the + terminal.John Mohr said:
Mmm... I must not be understanding something here quite right. When you say 'new' in the first question above, I would have assumed yes because in order for there to be a current, there has to be some input for that current. This current then ends up at the positive terminal where the electrons enter the battery.kuruman said:
Yes, this is what I have thought as well, but the video clip seems to say something different.Dale said:
Not 'inaccurate', so much as 'incomplete'. The Voltage that the battery can supply (Joules per Coulomb delivered) is modified by the Current (Coulombs per second) flowing though and will always be less than the so-called electromotive force. The EMF is the limiting voltage as the current approaches zero and when no energy is lost in the battery. The (again, so-called) Internal Resistance of the battery is a term used for the mechanism for the internally lost Power (I2R0). The mechanism can be treated as a small series resistance but is not actually constant for all values of current but is near enough for Jazz. You cannot 'look inside' a cell and measure the emf under load. It's all just a handy model - as are many of the Equivalent Circuits we use in EE.vanhees71 said:
I think this needs to be reiterated. The Thevenin equivalent ideal battery (ideal source+ series resister) is no more "physical" than the Norton equivalent (ideal source + parallel resister) . Many folks wander off the garden path by believing the model is reality.sophiecentaur said:
That’s a sign of a very elfie attitude. (Sorry)hutchphd said:
I am also convinced that there were three elves wearing space suits, in the cathode of every colour CRT. Their job was to select only the red, green or the blue coloured electrons, then load them into the appropriate gun.hutchphd said:
I had great problems stopping the lovely James Burke (of BBC TV fame) from talking on air about red green and blue electrons in one of his series. He did listen to me eventually and never spoke those words. They did, at least, use Scientific advisors for his programmes. No absolute howlers went out (not that I noticed)Baluncore said:
Not elves, but Maxwell's Demons.Baluncore said:
Breaftakingly bad. 'earty congratulations.sophiecentaur said:
A DC cell or battery supplies electrons through a chemical reaction, where the anode (negative terminal) releases electrons and the cathode (positive terminal) absorbs them. This creates a flow of electrons, or electric current, from the negative to the positive terminal.
A DC cell is a single unit that converts chemical energy into electrical energy, while a battery is a collection of multiple cells connected in series or parallel to increase the overall voltage or current output.
No, DC cells and batteries do not run out of electrons. The chemical reactions that occur within them may eventually deplete the reactants, causing the cell or battery to lose its ability to produce electricity, but the electrons themselves are not consumed or used up.
Yes, a DC cell or battery can supply too many electrons if the circuit it is connected to has a low resistance. This can cause the cell or battery to overheat and potentially damage it. It is important to use the correct voltage and current rating for your device to prevent this from happening.
The lifespan of a DC cell or battery depends on various factors such as the type of cell or battery, the amount of energy it is required to supply, and the conditions it is used in. Generally, most batteries have a lifespan of a few years before they need to be replaced.