How to Get Electric Field from Electric Potential | Physics with Professor Matt Anderson

How to Get Electric Field from Electric Potential | Physics with Professor Matt Anderson | M20-01

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Physics with Professor Matt Anderson

2 жыл бұрын

Okay, we understand electric field and electric potential separately, but clearly they are related. Let's look at how we can get the field from the potential.
Physics with Professor Matt Anderson

Пікірлер: 5

@maskedmarvyl4774 2 жыл бұрын

Very nice demonstration, thank you. However, at 5:00, you write the equation V/r=E. Are you using Ohm's law here at this point and assuming the audience understands what you are doing (Voltage V divided by the resistance R equals the current E), or does "r" represent the radius that you drew on your point charge earlier to represent your equipotential surface?

@fizixx 2 жыл бұрын

You DO see r-hat there, way before that 5 minute time, right? Resistence isn't a vector. So that should be indicating to you that this isn't Ohm's law, and V/r is not current.

@yoprofmatt 2 жыл бұрын

Great discussion, people. And yes, when you divide voltage by distance you get units of electric field. It gets confusing when we reuse letters like R (resistance) and r (radius). Which physicists do a lot. And then we used greek. Need more letters. Cheers, Dr. A

@peterwan小P 6 ай бұрын

I’m sorry professor, but this still doesn’t make sense to me. If it’s a sheet of charge how can its potential be increasing over Z which should be away from the plate and still have negative V below z = 0

@backspace2811 5 ай бұрын

V is starting at positive then gets closer to 0 as it gets further from positive sheet of charge