What is a charge in the protons & electron ?why same if they have different mass?

Answer 1

Excellent Question. Charge is a property of matter. We don't know why things have charge, but it tells us how strongly a particles interacts with the Electromagnetic field (which is carried by photons). Perhaps one day, some theory will explain the origins of charge, but for now, we don't know.

Perhaps a more interesting question is "Why does the proton and electron have EXACTLY equal but opposite charge (as best we can measure it)?" That may be a question we can't answer as well, but it's certainly a wonderful coincidence! Otherwise, we'd be in a lot of trouble.

A related question to the one above is "Why is charge quantized in the universe?" This is asking why do charges always come in multiples of the electron charge? Quarks are multiples of 1/3 the electron charge (but never 3/8 for example) and other particles are integer multiples of the electron charge. This is a question we might have some hints to answer: Dirac showed that the existance of a single Magnetic Monopole (forbidden in Classical Electrodynamics) would explain charge quantization. Other ways of explaining it involve extra-dimensions and perhaps string theory.

So, I know I didn't really answer your question. But that's because physicists are still trying to answer it themselves. Get a PhD in physics, answer it, and you'll win a Nobel Prize.

Answer 2

Maybe it's like asking why do you and your reflection look alike -- except that the reflection is a little dimmer, and exactly backwards. The answer to that question has to do with the fact that there are mirrors and also with the way light interacts with mirrors. Are there "mirrors" that explain the electron/proton situation, and what are their properties? Maybe one day we'll find out.

Answer 3

Electrons have a negative charge and protons have a positive charge. They aren't the same at all.

Answer 4

The charge is not based on the mass. (Proton is positive, electron is negative)

Answer 5

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