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(5) Two very large parallel sheets have equal uniform surface charge density in magnitude, jo| = 5.82 /C/m , but opposite in sign. The magnitude of the net force on a point particle with charge 7e placed in the space between the two sheets is most nearly (10) In the immediately preceding question, suppose that the radii of the hole and the conductor are 2.70 cm and 7.43 cm, respectively. The electric field magnitude at a point P situated at a distance of 0.775 cm from the centre of the hole is most nearly