/sci/ - Science & Math

>>15226552
electrolytes aren't connected

You can only have a voltage with a reverence. To the 9V battery has 2 electrodes with a potential difference of 9V. If you take 2 electrodes that are not connected, the potentials have no reference to each other so the electrons don't know which way to "flow" since the electrodes have no potential reference to each other.

>>15226552
Connect the remaining pair with a wire and it will. (but with 18V)

>>15226552
Bulbs work on AC and not DC.

>>15226552
>Isn't there a potential difference of 9v
this is what studying physics without chemestry does to a mf lol

>>15226552
Too much voltage applied bends the band too much, allowing the electrons to tunnel directly from the valence into the conduction band without a proper bandgap recombination, which means instead of steady light as an led would expect you just tunnel the current directly through the semiconductor

>>15226552
Wrong polarity lmao

>>15226552

>>15226637
>>15226869
Lightbulbs have no polarity.

>>15226640
it's this btw

as one battery loses electrons and the other gains (which is what is happening here, right?) they each build up "static," ionic charge which resists the reaction powering it (and resists any more electrons from moving).

>>15226552
>Isn't there a potential difference of 9v
nope. it could be zero, or anything, when they're not in contact. The potential difference a battery creates is between its two terminals, not between one terminal and its surroundings. So on the left you've got ~0V and on the right you've got ~0V (after the first static discharge).

>>15226552
Side note- the wiring colors are wrong. Black = hot and Red often is hot as well.

i tried this and it lit up. stupid theorists.

>>15226552
I used to always stick these two types of battery together as a kid because I thought it was cool that they hear up.

>>15227125
this guy gets it

It will work for a moment. However electrons will flow to the cathode and build up a net charge which will quickly reduce the voltage to zero. You might see a little flash before this happens depending on the bulb and batteries, I have no idea. Anyway that's why you need to connect the other pair, so electrons can also flow the other way and make the net flow of charge zero. It's kind of like the salt bridge in a liquid battery.

>>15226552
Do this and you have more power, and double the fun

Their potential difference becomes 0 in few nanoseconds
>>15227125
This

>>15226552
where's the circuit?

>>15226637
Have you never disassembled a flashlight before?

>>15226562
> the electrons don't know which way to "flow"
The electrons are not alive retard

>>15226552
incomplete circuit
and no, there isn't a potential difference in the connection you posted

>>15226552
>. Isn't there a potential difference of 9v so the light should bright
basically no, there isnt. By connecting the batteries like that you have created a small capacitor in series with the batteries whos voltage opposes that of the batteries. This capacitor charges up initially so perhaps the light bulb glowed by a millisecond when the connection was made

>>15229377
That's why I used quotation marks, retard. Of course they are not alive. They move to the lowest potential. But if you have 2 unconnected electrodes you have no potential ie no flow.

>>15226562
What is a reverence?

>>15228664
there's only one type of battery in the image, what are you talking about?

>>15230233
Reference

lmao....all technology is dissappearing when its only zoomers left

>>15226552
> Isn't there a potential difference of 9v
No there isnt, thats why it doesnt work. Both terminals are at the same potential

>>15227125
Woooooooooooo mummy sucks you off tonight.

>>15230867
It's bad enough as it is when so many actually think power is transmitted by electrons travelling through the wire.

>>15231122
Someone midwit has had too much scienceslop from youtube. You.

>>15226552
You need electron flow in order to generate electricity.
You can imagine batteries as electron pumps.
They are pretty much useless if they don't have access they can pump from one side to the other.
It's for the same reason why water supply systems are designed in closed circuits.

>isnt there a potential difference of 9v
No
There is a potential difference between the + and - of the battery but not the + of one battery and not - of some other battery. Measure with a multimeter meter and you will get 0 volts.
To talk about it conceptually charge (ie electrons) from one side hate the charge difference they have inside the battery and want to even it out so they flow through the wire to get the other side to even it out.

>>15232805

>>15226869
First of all, that's correct polarity. Second of all, as the other anon said incandescent bulbs have no polarity.

>>15226562
>the potentials have no reference to each other so the electrons don't know which way to "flow" since the electrodes have no potential reference to each other.
most retarded thing i've read on /sci/ of all time

>>15228971
it's free energy

>>15226552
>>15226562
so explaining power in school with an amount of free electrons floating into atoms who missing electrons is a lie ?

If you're trying to create an 18V battery, it does work.

>>15226552
Everyone in this thread is a moron who doesn't know how electricity works. Yes, there is a potential difference of 9 volts. However, current cannot flow. Think about it. The electrons (or electron holes if you like) have to flow to somewhere. Otherwise they would just pile up in one battery, but that's not how it works. So essentially, the resistance is infinite in this case, which fits with the V=IR equation.

>>15236371
nevermind my explanation is bad and i am retarded

>>15236389
>>15236371

>>15236371
The poster of this comment is a moron who doesn't know how electricity works.

>>15229439
if this is true how come I cant hook up one of the batterys the other way around? polarity is inherintly real so the potential to the bulb can't just be 0
>>15227125
also putting 9v batteries in series makes 18v so your numbers are a bit wrong

>>15236564
>also putting 9v batteries in series makes 18v so your numbers are a bit wrong
no they aren't. the numbers are right up to an additive constant, as the only important thing is voltage difference. if you want to put your 0V reference on one side of the battery just add/subtract 9V from all my numbers. the physics are identical

>>15228483
Thats only with AC power.

>>15227125
nailed it
>>15236564
no it's correct, to get a potential difference you subtract the two values, so 9-(-9)=18v.

>>15231447
stop believing in your textbook fantasies and prove him wrong