What is the deal with kinetic and potential energy, electricity and magnetism

In summary: Both electric and magnetic fields exist in a manner where they can't be separated. It's not that they are linked, but rather that they are inseparable.In summary, there can't be magnetic monopoles, which means that electric and magnetic fields exist together in a way that they can't be separated.
  • #1
h3x3n
15
0
Hello,
Firstly i am new here ( not offering an excuse) and an on and off lurker to this awesome forum. I am trying my best to fit into the established rules ,sorry if i broke any inadvertently.

If kinetic and potential energy represent the same things why are there entities representing the same thing and the same with electric and magnetic forces.

Is there any explicit reason other than " conservation of energy" and/or "depends on which one you end up using by virtue of your point of view/interest" to use what looks like redundant quantities for representing the same entity.

Also last question: what exactly does kinetic and potential energy as a whole try to represent analogously what does electric and magnetic forces as a whole try to represent ??
 
Physics news on Phys.org
  • #2
Do you really think that we would make such progress in physics if we didn't distinguish between P. and K. energy, and between electric and magnetic force? Don't you think our analytic powers would be significantly reduced?
As for your last question, kinetic and potential energy as a whole represent mechanical energy, and electric and magnetic forces as a whole represent electromagnetic force.
 
  • #3
Hi!

Obviously there are reasons why they are separated as different entities. Take this for an example, an object that is high in the ground, has high potential energy and when it goes down, kinetic energy increases while the other decreases. This highly contributes to the application of vast industries. Roller coasters? Check. Land development? Check. Rocket launching? Check! All have to be referred to this concept (and others too of course) to ensure safe and smooth operation.

As for electricity and magnetism, well, electricity induction is one primary subject to be focused on. Electricity can be produced just by using the Earth's North-South polarity. More applications to come.

As you can see, these diversions let scientists and engineers to work much easier than compiling them into one. It's just logic. 2 different things. Duality must exist.

Cheers!
 
  • #4
Hello thanks to both for the answers.
So the main point here being analysys and duality ??

amirfkr said:
Hi!As for electricity and magnetism, well, electricity induction is one primary subject to be focused on.
Cheers!

So induction is how energy transfer occurs ( even in static electric fields ??) so if induction helps in energy transfer then why the need for both electric and magnetic fields ( all this time i had thought magnetic field is the one that transfers energy and hence there is no transfer of energy in static electric fields, also because i have read that magnetic field is caused by flowing electric charges this point was reinforced albeit skewedly.

Thanks
~
 
  • #5
I don't understand the question. I don't actually think many of your premises are correct... kinetic and potential energy aren't the same, nor are the electric and magnetic forces.

Is there a way you can rephrase the question without using ambiguous terms like "entity"?
 
  • #6
MikeyW said:
I don't understand the question. I don't actually think many of your premises are correct... kinetic and potential energy aren't the same, nor are the electric and magnetic forces.

Is there a way you can rephrase the question without using ambiguous terms like "entity"?
Instead of saying a body has X amount of mechanical energy why do people say it has nx Potential energy and (1-nx) Kinetic energy or viceversa.

Arent electric and magnetic forces the same ( i remember reading that they are like 2 sides of the same coin).

Regards,
~
 
  • #7
1st q: Because the mechanical energy is defined as the sum of kinetic and potential energy. That's a useful definition because the sum will remain constant under certain assumptions.

2nd q: They are linked, in a way that they cannot be separated into two different and unrelated forces, but they are certainly not the same.
 
  • #8
MikeyW said:
2nd q: They are linked, in a way that they cannot be separated into two different and unrelated forces, but they are certainly not the same.
@ Mikey thanks for the reply, i have some more questions.
But both are quantified by photons ??

What are the practical implication of "there can't be magnetic monopoles" on both electric and magnetic fields existing in a manner in which they can't be separated.
 

1. What is the relationship between kinetic and potential energy?

Kinetic energy is the energy an object possesses due to its motion, while potential energy is the energy an object possesses due to its position or state. The relationship between the two is that an object's potential energy can be converted into kinetic energy and vice versa. For example, a ball at the top of a hill has potential energy, but when it rolls down the hill, that potential energy is converted into kinetic energy.

2. How does electricity work?

Electricity is the flow of electrons through a conductive material. When there is a difference in electrical charge between two points, electrons will flow from the area of higher charge to the area of lower charge, creating an electric current. This flow of electrons can be harnessed to power electrical devices.

3. What is magnetism and how does it relate to electricity?

Magnetism is the force that causes objects to attract or repel each other. It is caused by the movement of electrons, which create a magnetic field. In electricity, moving electrons create a magnetic field, and a changing magnetic field can induce an electric current. This is the principle behind generators and motors.

4. How are electricity and magnetism related?

Electricity and magnetism are closely related as they are both forms of electromagnetism. This means that they are two aspects of the same fundamental force. According to Maxwell's equations, a changing electric field will produce a magnetic field, and a changing magnetic field will produce an electric field.

5. How do electricity and magnetism play a role in everyday life?

Electricity and magnetism play a crucial role in our daily lives. They are used in a wide range of technologies, from powering our homes and devices to transportation and communication. Without electricity and magnetism, many of the conveniences and advancements in modern society would not be possible.

Similar threads

Replies
3
Views
477
Replies
15
Views
3K
Replies
9
Views
1K
Replies
4
Views
1K
Replies
11
Views
3K
Replies
4
Views
860
Replies
14
Views
1K
Replies
5
Views
863
Replies
1
Views
956
  • Electromagnetism
Replies
1
Views
710
Back
Top