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    Positive charge, magnitude of the electric field, charge is distributed uniformally

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    1) Positive charge Q is placed on a conducting sphereical shell with inner radius R1 and outer radius R2. A point charge q is placed at the center of the cavity. The magnitude of the electric field at a point outside the shell, a distance r from the center is:

    2) Positive charge Q is placed on a conducting sphereical shell with inner radius R1 and outer radius R2. Apoint charge q is placed at the center of the cavity. The magnitude of the electric field produced by the charge on the inner surface at a point in the interior of the conductor a distance from the center is:

    3) Charge is distributed uniformally on the surface of a large flat plate. The electric field 2cm fom the plate is 30N/C. The electric field 4cm from the plate is:

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    https://brainmass.com/physics/gauss-law/positive-charge-magnitude-of-the-electric-field-charge-is-distributed-uniformally-43458

    Solution Preview

    1)
    By using Gauss law, E*4Pir^2=(Q+q)/k (k is the dielelctric constant)
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