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An infinitely long solid cylinder of radius R has a uniform volume charge density r. It has a spherical
cavity of radius R/2 with its centre on the axis of the cylinder, as shown in the figure. The magnitude of the
electric field at the point P, which is at a distance 2R from the axis of the cylinder, is given by the
expression  The value of k is
  • a)
    6
  • b)
    12
  • c)
    2
  • d)
    4
Correct answer is option 'A'. Can you explain this answer?
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An infinitely long solid cylinder of radius R has a uniform volume charge density r. It has a sphericalcavity of radius R/2 with its centre on the axis of the cylinder, as shown in the figure. The magnitude of theelectric field at the point P, which is at a distance 2R from the axis of the cylinder, is given by theexpressionThe value of k isa)6b)12c)2d)4Correct answer is option 'A'. Can you explain this answer?
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