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MHT CET202120 Sep 2021Morning ShiftPhysicsElectrostaticsActual

A hollow charged metal sphere has radius ' R '. If the potential difference between its surface and a point at a distance ' 5 R ' from the centre is V, then magnitude of electric field Intensity at a distance ' 5 R ' from the centre of sphere is

Options

  1. AV 2 R
  2. BV 20 R
  3. C10 VR
  4. D20 VR

Correct answer

B. V 20 R

Step-by-step solution

aligned & V = 1 4 ₀ q R - 1 4 ₀ q 5 R & = 1 4 ₀ q R (1- 1 5 ) & = 1 4 ₀ q R ( 4 5 ) & E = 1 4 ₀ q (5 R )^2 & E V = 1 20 R or E = V 20 R aligned

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