# Battery voltage question

• jaydnul
In summary, voltage between two plates in a battery is determined by the potential difference between a point on the positive plate and a point directly across from it on the negative plate. This potential difference is the result of the chemical state of the plates and the nature of the electrolyte. The 5V of a battery is not a simple integration of potential differences, but rather a constant potential within a perfect conductor. Connecting a wire would still measure a single voltage, regardless of the non-parallel plates.

#### jaydnul

How is voltage between two plates, like in a battery, determined? When you have a 5V battery, is that the potential difference between a point on the positive plate and a point directly across from it on the negative plate? If so, that means they have to be parallel in order for the calculated voltage to be same at any point you choose.

Or is the 5V some sort of integration of a bunch of point to point potential differences across the area of the plate?

My guess would be the latter for this reason: if the plates were not parallel, then every potential difference between two points will be different because some pairs of points are further away from each other than others. But if you connected a wire, you would still measure a single voltage produced by the two non parallel plates.

Any help?

Within a (perfect) conductor, the potential is always constant, it does not matter where you measure the potential difference.

The potential in a battery is mostly due to the chemical state of the plates, positive ions on the postitve plate and/or negative ions on the negative plate, and the nature of the electrolyte between the plates. I would think that only a small part of the voltage is related to the charge and distance between plates.

## 1. What is battery voltage?

Battery voltage refers to the electrical potential difference between the positive and negative terminals of a battery. It is measured in volts (V) and indicates the amount of energy a battery can provide to an electrical circuit.

## 2. How is battery voltage measured?

Battery voltage can be measured using a voltmeter, which is a device that measures the potential difference between two points in an electrical circuit. The voltmeter is connected to the positive and negative terminals of the battery and displays the voltage reading in volts (V).

## 3. What is the ideal voltage for a battery?

The ideal voltage for a battery depends on its type and purpose. For example, a standard AA alkaline battery has a voltage of 1.5V, while a car battery typically has a voltage of 12V. The ideal voltage of a battery is usually listed on the battery itself or in the manufacturer's specifications.

## 4. Can battery voltage be too high or too low?

Yes, battery voltage can be too high or too low. If the voltage is too high, it can damage electrical components in a circuit. If the voltage is too low, the battery may not provide enough power to operate the intended device. It is important to check the voltage requirements of the device and use a battery with the appropriate voltage.

## 5. How does temperature affect battery voltage?

Temperature can affect battery voltage. Generally, cold temperatures can decrease battery voltage, while hot temperatures can increase it. This is because temperature affects the chemical reactions happening inside the battery that produce electricity. It is important to store and use batteries in temperatures recommended by the manufacturer to ensure optimal performance.