Basic Question: Positive and Negative Electrical Charge

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Discussion Overview

The discussion centers around the fundamental differences between positive and negative electrical charges, exploring their characteristics and the underlying principles governing them. Participants express curiosity about the nature of these charges, touching on theoretical and conceptual aspects without reaching definitive conclusions.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions whether positive and negative charges are merely accepted dualities in nature without deeper understanding.
  • Another participant mentions that particle physicists use symmetry arguments to explain the coexistence of positive and negative charges, linking it to the existence of anti-particles.
  • A clarification is made regarding the distinction between protons and positrons, emphasizing that the positron is the anti-particle of the electron.
  • It is noted that the concept of positive and negative charge originated from experimental observations of attraction and repulsion between objects.
  • A later reply suggests that understanding electric charge in depth may require knowledge of quantum electrodynamics (QED) and charge renormalization.
  • A participant expresses a need for foundational knowledge before engaging with the topic and requests recommendations for beginner-friendly physics books.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and curiosity about the topic, but there is no consensus on the nature of positive and negative charges or the implications of their existence. The discussion remains unresolved with multiple perspectives presented.

Contextual Notes

Some participants acknowledge the complexity of the topic and the need for foundational knowledge, indicating that assumptions about prior understanding may limit engagement with the discussion.

Who May Find This Useful

This discussion may be useful for individuals curious about the fundamental concepts of electrical charge, those seeking to understand the theoretical underpinnings of particle physics, and beginners looking for introductory resources in physics.

Sathyaish
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I am not a student of Physics. I want to know. I am curious. I never understood a basic thing. What is the difference between a positive and a negative electrical charge? What characteristics describe the two charges?

Are they just something you mug up as a given example of the duality in the natural laws -- such as the existence two genders -- without probing further into the individual natures that distinguish the elements in the duality?
 
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Aside from the obvious (like charges repel, opposites attract)?

Particle physicists often use symmetry arguments to explain why positive charge must exist in conjunction with negative charge. For example, it can be argued that for each particle there must exist a corresponding anti-particle; and that anti-particle must possesses a charge opposite to that of the original particle.

One could then query why electrons possesses negative charges etc. but this really boils down to why "normal" matter dominates ordinary matter, a question which is currently unresolved.

This is not my field of expertise, so I'm hand waving a little here.

Claude.
 
One should be careful though to not confuse the proton as being the anti-electron, because it has the opposite charge of an electron. The antiparticle of the electron is the positron, not the proton.

The idea of positive and negative charge came from experimental observations that some objects attracted each other, while others repeled each other. To explain this effect, it became convenient to come up with the idea of positive and negative charge. From a modern perspective, we now know charge comes from the U(1) gauge symmetry of the QED Lagrangian (I know if you are not a physicist, this just sounds like math jargon).
 
Sathyaish said:
I am not a student of Physics. I want to know. I am curious. I never understood a basic thing. What is the difference between a positive and a negative electrical charge? What characteristics describe the two charges?

Are they just something you mug up as a given example of the duality in the natural laws -- such as the existence two genders -- without probing further into the individual natures that distinguish the elements in the duality?

"Probing further into the individual natures that distinguish the elements in the duality" is what goes on all the time in physics research, and has been going on for electric charge for a very long time.

If you want to get deeper into the nature of electric charge, you probably need to learn the theory of QED and the charge renormalisation. It is fascinating, but demands a comprehensive knowledge of physics.
 
I understand some of each of your answers. Thank you for taking the time.

But I feel like I need some basic prep before I can understand the answer to my question.

Could you point me to a very basic book on Physics that will be nice to read for a newbie? I must understand its contents and enjoy reading it.

Thank you.
 
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