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A charged particle q is placed at the centre O of a cube of length L ABCDEFGH . Another same charge q is placed at a distance L from O . If the total electric flux through the cube is 6 ϕ then the value of ϕ is

Options

  1. Aq 4 ε 0
  2. Bq 6 ε 0
  3. Cq 2 ε 0
  4. Dq 3 ε 0

Correct answer

B. q 6 ε 0

Step-by-step solution

The net flux through the cube due to the external charge is zero and for the charge inside the cube, it is q ε 0 through all the surfaces. For one surface, it is q 6 ε 0 .

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