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Electrons flow from positive terminal to negative terminal inside a battery?

If a bulb is connected to a battery, then in the bulb the direction of current is such that it flows from negative terminal of battery to its positive terminal. Whereas inside a battery electrons flows from positive terminal to negative terminal. How is that possible? If this is true wont it look like saying that a battery has infinite life time as battery discharges via bulb but charges inside by itself.




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ELECTRONS are not responible for CURRENT in a battery ! Current in a battery is an ionic phenomenon.

Electronic conduction underlying the current flow mechanism is largely confined to metals.
TimH1163 months ago

As far as a car batter is concerned:

Oxidation: Pb + SO4(-2 charge) => PbSO4 + 2e-

Reduction: PbO2 + 4H+ SO4(-2 charge) + 2e- => PbSO4 +2H2O

Let's think here! Oxidation, inside the battery, takes place at the anode and INSIDE the battery, the electrons flows toward the cathode where the reduction takes place. BINGO, the electrons continue out of the POSITIVE side of the battery.

Think about this. When disconnecting the battery, which terminal do you disconnect first? BINGO! You guessed it! The NEGATIVE terminal. Why? Because there is NO electron flow there! Hallelujah PRAISE THE LORD! Somebody paid attention in science class! LOL

TimH1163 months ago

No don't argue! Oxidation means loss of electrons! LOL

TimH1163 months ago

I think what everyone is forgetting about is that the battery is oxidized at the anode.

Bingo! There you go. Oxidation means loss of electrons. What happens when electrons are lost? Yes there is electron flow inside the battery because it is oxidized at the anode and reduced at the cathode- gain of electrons. Let's look at a dry cell. The Zinc case loses electrons to be oxidized and produce positively charged ions. Reduction occurs at the Cathode which is manganese oxide. Yes the electrons DO travel in the battery via a graphite medium. I don't mean to be rude here, but electrons do travel out the positive terminal. YES THEY DO! STOP ARGUING! Come on people! THINK! ha ha

rickharris4 years ago
Electrons are negatively charged and will always flow in the direction of the most positive charge as like magnets like poles(charges) repell and unlike poles (charges) attract.

It's not that the battery is depleted its that the chemical imbalance that gives the electrons their "push" is balanced. this balance is restored in a rechargeable battery by applying an external force to put the electrons back where they started.

try reading through this.

http://www.instructables.com/id/How-electricity-and-electronics-works/
"It's not that the battery is depleted its that the chemical imbalance that gives the electrons their "push" is balanced... "

I agree. Everything in physics (all energy, matter, etc) seeks an equilibrium.
jimsjunk23 years ago
Yes, electron's move from neg to pos as evidenced by batteries and lightning (even ground to sky lightning goes from the neg to pos ions). I think the confusion comes in when you start thinking that electrons are filling "holes" and the holes are "moving" in the opposite direction. The electron microscope didn't immediately do away with this thought. (kinda just showed us where p/n's clustered up, even though there was general movement), It kinda depends on which you're going to call "current".

Most people will say it really doesn't matter when evaluating a circuit, and I haven't found that assumption to be invalid, (try going both directions for eval purposes - answers are the same).

If you're confused by this, think of a diode. Current only 'flows' in one direction. the cathode side (neg) is then your pos terminal in a circuit. But that doesn't mean it actually flows from pos to neg in the circuit. You've just effectively made your 'source' part of your circuit.
boy, that's clear as mud.

I'll TRY to sum it up: electrons 'move' from neg to pos - in circuit/supply, whatever. Negative charges are always attracted to more positive ones. If you can remember that, it's really not that confusing. And for circuit eval, which ever way seems easier to you, just do that.
verence4 years ago
The electrons kind of 'flow' inside the battery from positive to negative terminal. Or better, they get pushed there by chemical and/or physical reactions inside the battery. Once all reagents are used up, the chemical reaction stops (it gets less vivid before that, so the voltage will drop as a result) and the battery is 'empty'.

As the electrons don't get neither created nor destroyed - yes, the electrons have an infinite lifetime. The battery in a whole does not.

With some types of batteries, the chemical reaction is reversible by applying an external voltage - by charging the battery.