What is the result of connecting two identical storage batteries?

[Perseverence]

Homework Statement

Number 9 page 38 Sterling
What is the result of connecting two identical storage batteries in parallel in a circuit?[/B]

Homework Equations

Q/V=C
V=I R

The Attempt at a Solution

The solution is that the voltage is the same but twice the total charge compared to the Circuit of a single battery.

I don't understand how total charge can change but voltage does not change proportionately. Isn't it a property of capacitance that charging voltage change proportionately together?

 

[tnich]

Homework Statement

Number 9 page 38 Sterling
What is the result of connecting two identical storage batteries in parallel in a circuit?[/B]

Homework Equations

Q/V=C
V=I R

The Attempt at a Solution

The solution is that the voltage is the same but twice the total charge compared to the Circuit of a single battery.

I don't understand how total charge can change but voltage does not change proportionately. Isn't it a property of capacitance that charging voltage change proportionately together?

It is very difficult to give you any help on this without knowing what the problem is that you are trying to solve. Could you give the complete problem statement, please?

 

[Perseverence]

It is very difficult to give you any help on this without knowing what the problem is that you are trying to solve. Could you give the complete problem statement, please?

This is the entire question as I have written it. I have attached a picture of the question so that you can see it

 

[Perseverence]

This is the entire question as I have written it. I have attached a picture of the question so that you can see itView attachment 223908

What is the result of connecting two identical storage batteries in parallel in a circuit?

 

[Perseverence]

It is very difficult to give you any help on this without knowing what the problem is that you are trying to solve. Could you give the complete problem statement, please?

Wow. If you feel like the question was incomplete as written, imagine how frustrating it was for me. LOL[emoji33]

 

[pokemon123]

Perhaps I'm wrong but is "storage battery" another term for capacitor? If so, I believe the capacitance is double as they are in parallel so you add the capacitance of each "storage battery" together. Q/V=C 2Q/V=2C. Voltage must remain the same since they are in parallel. If I'm wrong I apologize T_T

 

[tnich]

Wow. If you feel like the question was incomplete as written, imagine how frustrating it was for me. LOL[emoji33]

I see what you mean. I don't think it is a well-posed question. Here is what I think it means. When you have two identical batteries in parallel, then the pair of batteries have the potential to supply twice as much total charge before they run down. So in a circuit with resistors, they might last twice as long.
For the case you mention, if the batteries are being used to charge a capacitor with a large capacitance, then the batteries may run down before they fully charge the capacitor. In that case, the voltage supplied by the batteries would start to decrease and then some equilibrium would be reached with the capacitor. The two battery circuit could supply more charge to the capacitor, but it might not end up being twice as much, depending on where the equilibrium points are.

 

[tnich]

Perhaps I'm wrong but is "storage battery" another term for capacitor? If so, I believe the capacitance is double as they are in parallel so you add the capacitance of each "storage battery" together. Q/V=C 2Q/V=2C. Voltage must remain the same since they are in parallel. If I'm wrong I apologize T_T

I think your interpretation makes sense - a lot more sense than the original question as stated.

 

[Perseverence]

Perhaps I'm wrong but is "storage battery" another term for capacitor? If so, I believe the capacitance is double as they are in parallel so you add the capacitance of each "storage battery" together. Q/V=C 2Q/V=2C. Voltage must remain the same since they are in parallel. If I'm wrong I apologize T_T

Thank you to everyone for your explanation. It makes sense now. I'm glad to hear that the question was a bit confusing and that I'm not just going crazy.