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NEET2020PhysicsElectrostaticsActual

A spherical conductor of radius 10 cm has a charge of (3.2 10⁻⁷ C ) distributed uniformly. What is the magnitude of electric field at a point 15 cm from the centre of the sphere? ( ( 1 4 ₀ =9 10^9 Nm ^2 C ⁻² ) )

Options

  1. A1.28 × 10 5   N   C - 1
  2. B1.28 × 10 6   N   C - 1
  3. C1.28 × 10 7   N   C - 1
  4. D1.28 × 10 4   N   C - 1

Correct answer

A. 1.28 × 10 5   N   C - 1

Step-by-step solution

E = k Q r 2 = 9 × 10 9 × 3 .2 × 10 − 7 15 × 10 − 2 2 E = 1 . 28 × 10 5   N   C - 1

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