Two problems on electrostatics
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1. Two charged concentric spherical shells have radii 10.0cm and 15.0cm. The charge on the inner shell is 4.00X10^-8C, and that on the outer shell is 2.00X10^-8C. Find the electric field (a) at r = 12.0cm and (b) at r = 20.0cm.
2, Two Large metal plates of area 1.0 m^2 face each other. They are 5.0 cm apart and have equal but opposite charges on their inner surfaces. If the magnitude E of the electric field between the plates is 55 N/C, what is the magnitude of the charge on each plate? Neglect edge effects.
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The solution displays two problems on electrostatics. Charged shells and plates are examined.
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SOLUTION
1. Two charged concentric spherical shells have radii 10.0cm and 15.0cm. The charge on the inner shell is 4.00X10-8C, and that on the outer shell is 2.00X10-8C. Find the electric field (a) at r = 12.0cm and (b) at r = 20.0cm.
2x10-8 C
4x10-8 C 12cm
15cm
10cm Gaussian surface (A)
Gaussian surface B 20 cm
a) To determine E at r = 12 cm, we consider for a Gaussian surface a ...
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