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GAUSS LAW, Electric potential, ELECTROSTATICS, Coulomb's law - Coggle…
GAUSS LAW
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GAUSSIAN SURFACE
-OFTEN A SPHERE, CYLINDER OR SOME OTHER SYMMETRICAL FORM
-CAN BE ANY SHAPE, BUT MOST USEFUL SURFACE IS ONE OF THAT MIMICS THE SYMMETRY OF THE PROBLEM AT ONE HAND
-ALWAYS BE A CLOSED SURFACE
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1st equation:
Select a gaussian surface around the charge of radius r, with the charge +q at the centre. Therefore, Gauss's law yield a close integral function
2nd equation :
the Gaussian surface is a sphere of area A=4pi
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Basic cases where Gauss's law can be performed - single charge particles
-uniformly charge sphere
-uniform line charge
-uniform plane
-linear ; surface ; & volume charge density
Electric potential
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electrostatic potential energy for a positively charge conducting sphere as a function of distance, r
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Coulomb's law
definition
Coulomb's law state that the electrical force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
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unit of charge:coulomb, C
k=8.99x10^9 Nm^2/C^2
e=1.602x10^-19C
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