How does putting batteries in series increase voltage?

In summary: Correct.In summary, when you put batteries in series, the terminals connected to the load are supplying energy while the other terminals should just be neutralizing one another.
  • #1
Felchi
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0

Homework Statement


When you put batteries you place the negative terminals to the positive which supposedly "bumps' each electron to the next battery. However, the positive terminal is positive enough to neutralize the negative terminal and vice versa. Therefore, when I place batteries in series, only the terminals connected to the load are supplying energy. The other terminals should just be neutralizing one another, yes?

Even if the electrons are bumped along, how does it accumulate more voltage as it travels through the batteries?

Homework Equations


Please don't give me overly complicated equations. I'm only in grade 9.


The Attempt at a Solution


The only possibility I can think of is that the negative terminal has a greater charge than the positive terminal of the battery. In that case you would have electrons being "bumped along" but the number of "bumped" electrons would be (electrons in negative terminal)-(unneutralized protons in positive terminal), which wouldn't be very efficient.
 
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  • #2
There are no equations needed to explain this:

You're getting hung up on "terminals" in a meaningless way. Just think of eliminating the two terminal that are touching and think of it as having built a bigger battery (that is, more plate, so more volts, not bigger plates so more current).
 
  • #3
Just to clarify, how does a battery really work in the first place? That's what's confusing me.
 
  • #4
Felchi said:
Just to clarify, how does a battery really work in the first place? That's what's confusing me.

It's called a "battery" because it consists of multiple cells of this type:

http://en.wikipedia.org/wiki/Galvanic_cell

stacked together. Each cell produces a certain electric potential difference, and when the cells are combined in series to form a battery, their potentials add together. Same thing goes for combining two batteries (again, it's just a bunch of individual cells in series).
 
  • #5
The amount of charge at the terminals of a battery is relatively small. When there is a load (completed circuit) placed on the battery, the internal chemical reactions will maintain some amount of charge on the terminals corresponding to the voltage versus load for that battery until the battery is depleted.

In the situation where there is no external load and when you first connect the batteries in series, there is a very brief moment where the charge at the terminals results in a tiny amount of current flowing internally within the battery stack, but this only lasts for a brief moment while the internal chemical reactions compensate for a just connected series of batteries. Once a load is placed on the batteries, then the chemical reactions will create and sustain a current flow, and the voltage will equal the sum of the voltage of all the batteries in the series.
 
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  • #6
Why would the current within the battery stack not be sustained for a long period of time? Does the resistance of an external path somehow offer an incentive for the electrons to travel through it?
 
  • #7
Felchi said:
Why would the current within the battery stack not be sustained for a long period of time? Does the resistance of an external path somehow offer an incentive for the electrons to travel through it?

If a battery could run forever without getting depleted it would be a perpetual motion machine. Nothing can provide power forever, it's just that batteries run out more quickly than some power sources, such as the sun.
 
  • #8
Felchi said:
Why would the current within the battery stack not be sustained for a long period of time?
Asuming you mean the case where there is no external load, then the current flows for just a brief moment while charges at the terminals and the chemicals inside reach a point of equlibrium. The charges on the internal terminals is essentially neutral, while the outer terminals retain negative and positive charges.

When a load (completed circuit) is attached to the outer terminals, then the battery stack will maintain the charge corresponding to the voltage versus the load (current) for the outer terminals of the battery stack. The charges on the internal terminals will no longer be neutral, but transition from positive from the positive end of the stack to negative towards the negative end of the stack, again corresponding to the voltage and current flowing through the load and battery stack. During this time the potential energy inside the battery stack is being consumed in the form of a chemical transformation, eventually depleting the battery stack.
 
  • #9
So in a battery stack if I were to extract a cell from the middle it would have no charge because it would be neutral?
 

1. How does putting batteries in series increase voltage?

When batteries are connected in series, the positive terminal of one battery is connected to the negative terminal of the next battery. This creates a continuous loop for the flow of electrons, resulting in an increase in voltage. The voltage of each battery is added together, resulting in a higher overall voltage.

2. Why is it important to increase voltage in a circuit?

Increasing voltage in a circuit allows for more energy to be transferred to the components in the circuit. This can result in brighter lights, stronger motors, and faster electronic devices. It also allows for longer distances to be covered in a circuit without losing power.

3. What happens if batteries of different voltages are put in series?

If batteries of different voltages are put in series, the battery with the higher voltage will discharge into the battery with the lower voltage. This can result in one battery becoming drained while the other remains partially charged. It is important to use batteries of the same voltage when putting them in series to avoid this imbalance.

4. Can batteries in series ever decrease voltage?

No, batteries in series will always increase voltage. This is because the voltage of each battery is added together in a series circuit. However, if one of the batteries in the series is damaged or has a lower voltage, it can lower the overall voltage of the circuit.

5. Is there a limit to how many batteries can be put in series?

There is no specific limit to how many batteries can be put in series. However, the more batteries that are added, the higher the voltage will become. It is important to consider the voltage requirements of the circuit and the voltage of each individual battery when deciding how many batteries to put in series.

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