Ow does potential decreases when there there is force

  • Thread starter Thread starter lakshmi
  • Start date Start date
  • Tags Tags
    Force Potential
AI Thread Summary
When a positive charge and a negative charge are attracted to each other, their potential energy decreases as they move closer, converting energy into kinetic energy. If discussing voltage, the system behaves like a capacitor, where the voltage decreases as the charges come closer due to a reduction in capacitance. Conversely, if the charges start close together, work must be done to separate them, resulting in an increase in potential difference. The relationship between charge, voltage, and capacitance is crucial in understanding these dynamics. Overall, the potential changes based on the relative positions and movements of the charges involved.
lakshmi
Messages
36
Reaction score
0
how does potential decreases when there there is force of attraction between a positive charge and a negative charge
 
Engineering news on Phys.org
Do you mean potential energy ? It will decrease if they move together by an increase of kinetic energy.
If you mean voltage then think of the pair as a capacitor where C=Q/V or rewritten
V=Q/C as the charges are allowed ( under control) to get closer the capacity gets smaller so the voltage decreases.
Alternatively if you start with the charges very close you are going to do work to separate them -- the definition of potential difference is work done per unit charge so the potential increases on separation.
 
Thread 'Electromagnet magnetic field issue'

Thread 'Electromagnet magnetic field issue'

Hi Guys We are a bunch a mechanical engineers trying to build a simple electromagnet. Our design is based on a very similar magnet. However, our version is about 10 times less magnetic and we are wondering why. Our coil has exactly same length, same number of layers and turns. What is possibly wrong? PIN and bracket are made of iron and are in electrical contact, exactly like the reference design. Any help will be appreciated. Thanks. edit: even same wire diameter and coil was wounded by a...
View full post »

Thread 'Following up on the recent thread about Earth Resistance measurements'

I have recently moved into a new (rather ancient) house and had a few trips of my Residual Current breaker. I dug out my old Socket tester which tell me the three pins are correct. But then the Red warning light tells me my socket(s) fail the loop test. I never had this before but my last house had an overhead supply with no Earth from the company. The tester said "get this checked" and the man said the (high but not ridiculous) earth resistance was acceptable. I stuck a new copper earth...
View full post »
Thread 'Beauty of old electrical and measuring things, etc.'

Thread 'Beauty of old electrical and measuring things, etc.'

Even as a kid, I saw beauty in old devices. That made me want to understand how they worked. I had lots of old things that I keep and now reviving. Old things need to work to see the beauty. Here's what I've done so far. Two views of the gadgets shelves and my small work space: Here's a close up look at the meters, gauges and other measuring things: This is what I think of as surface-mount electrical components and wiring. The components are very old and shows how...
View full post »

Similar threads

How can the electric potential be constant between two points in a wire?
Replies
6
Views
1K
How does applying potential affect the energy band diagram for a diode?
Replies
3
Views
3K
How can voltage between unlike charges decrease with proximity?
Replies
4
Views
778
Earth ground resistance measurement
Replies
8
Views
588
Why is there confusion about capacitors and potential difference between plates?
Replies
9
Views
4K
B Some Questions about Electric Current/Capacitors to help my understanding
Replies
7
Views
2K
Asking some Capacitor questions to help my understanding
Replies
19
Views
2K
Voltage between two points on an empty wire and also across a resistor
Replies
12
Views
2K
Are the terminals of a Battery neutral?
Replies
27
Views
5K
Understanding How Batteries Store & Release Energy
Replies
16
Views
3K

Hot Threads

Recent Insights

Back
Top