How Does Load Current Influence the Voltage Across a Battery's Terminals?

In summary, the question is asking for a physics explanation of how load current affects the potential difference across the terminals of a cell. The correct explanation is that in an ideal power source, the potential difference is independent of load current, but in a real power source, the potential difference decreases as load current increases. The answer is to put a common electrical component in series with the ideal cell to mimic the behavior of a real cell. Ohm's Law is also necessary to fully answer the question.
  • #1
Cici2017

Homework Statement


Please provide a physics explanation of this question:
How does load current affect the potential difference across the terminals of a cell?

Homework Equations

The Attempt at a Solution


p.d. inversely proportional to current. Thus, when I increase, the p.d. decrease and vice versa

Is this a good enough 'physics explanation' for this question? Thanks~
 
Physics news on Phys.org
  • #2
Cici2017 said:
Is this a good enough 'physics explanation' for this question? Thanks~
No, it is not because in an ideal power source it is not true so you need to explain why it IS true (and preferably also to what extent it is true) in a real power source.
 
  • #3
phinds said:
No, it is not because in an ideal power source it is not true so you need to explain why it IS true (and preferably also to what extent it is true) in a real power source.
I don't know why is it true... :sorry:
 
  • #4
An ideal cell maintains terminal voltage independent of load current . In a real cell the terminal voltage drops as load current increases .

What common electrical component could you put in series with an ideal cell so that the ideal cell and the additional component together behave like a real cell ?

Edit : Haven't you essentially got the answer to this question in your previous posting?

https://www.physicsforums.com/threads/internal-resistance-of-a-cell.921160/
 
Last edited:
  • Like
Likes scottdave
  • #5
Voltage times current gives power, but to answer this question, you'll need Ohm's Law.
 
  • #6

1. What is the physical explanation of VI?

The physical explanation of VI stands for Visual Impairment, which refers to a broad term that encompasses any type of vision loss or impairment. This can include partial or total blindness, as well as various levels of low vision.

2. What causes VI?

VI can be caused by a variety of factors, including genetics, injury or trauma, diseases such as diabetes or glaucoma, and aging. In some cases, the cause of VI may be unknown.

3. How does VI affect the eyes and vision?

VI can affect the eyes and vision in different ways depending on the underlying cause. In general, it can result in reduced visual acuity, decreased ability to see colors, and difficulty with depth perception and peripheral vision.

4. Can VI be treated or cured?

There is no one-size-fits-all treatment for VI, as it depends on the specific cause and severity of the impairment. In some cases, corrective lenses, medication, or surgery may improve vision. However, some types of VI cannot be fully cured.

5. How can we support individuals with VI?

There are many ways to support individuals with VI, such as providing assistive devices and technology, creating accessible environments, and offering emotional and educational support. It is important to communicate and collaborate with individuals to understand their unique needs and provide appropriate accommodations.

Similar threads

  • Introductory Physics Homework Help
Replies
3
Views
251
  • Introductory Physics Homework Help
Replies
5
Views
1K
  • Introductory Physics Homework Help
Replies
5
Views
987
  • Introductory Physics Homework Help
Replies
1
Views
2K
  • Introductory Physics Homework Help
Replies
3
Views
1K
  • Introductory Physics Homework Help
Replies
5
Views
1K
  • Introductory Physics Homework Help
Replies
5
Views
1K
  • Introductory Physics Homework Help
Replies
5
Views
1K
  • Introductory Physics Homework Help
Replies
1
Views
1K
  • Introductory Physics Homework Help
Replies
5
Views
1K
Back
Top