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PhysicsNEET 2020Electric flux and Gauss's law with applications

Electric Charges and Fields

A spherical conductor of radius 10 cm has a charge of 3.2×10−73.2 \times 10^{-7} C distributed uniformly. What is the magnitude of the electric field at a point 15 cm from the centre of the sphere? (14πε0=9×109 N m2 C−2\dfrac{1}{4\pi\varepsilon_0} = 9 \times 10^9\ \mathrm{N\,m^2\,C^{-2}})

  1. A.1.28×1041.28 \times 10^4 N/C
  2. B.1.28×1051.28 \times 10^5 N/C✓
  3. C.1.28×1061.28 \times 10^6 N/C
  4. D.1.28×1071.28 \times 10^7 N/C

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