Two large thin metal plates are parallel and close to each other

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Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have excess surface charge densities of opposite signs and magnitude 7.00 x 10^-22 C/m^2. In unit-vector notation, what is the electric field at points (a) to the left of the plates, (b) to the right of them, and (c) between them?
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You rock. This stuff doesn't make a whole lot of sense to me, and I have found many of my homework questions on your channel. Keep up the good work.

timpoore
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Thanks for the video. Great quick, short explanation!

blangzo
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Can you tell me the direction of Electric field between two plates if one has -2 Sigma surface charge density and other plate has - Sigma surface charge density

vcc
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Thanks, cool!!
btw for which board are you teaching(which curriculum) and for which grade?
Just interested to know.
I'm learning as per the CBSE curriculum (Indian) and we have this in Grade 12.

Have a good day sir!!

poljosaju
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What is the formula for electrostatic force between two metal plates

smrutiranjansahoo
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My text book has E=(2*sigma)/epsilon.

Also how can the field vector cancel each other when their magnitudes are not equal at any point to the right or left of the two plates? E has the inverse square dependency, so as the distance from a charge to a point increases, the magnitude of E decreases.

themightyquinn
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What if the plates have different charge densities?

farisy
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From where the 2 in sigma/2epsilon comes?

forgetmenot
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Why we assume its noncounductor ? It’s metal

danafayez