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MHT CET202613 April 2026Morning ShiftPhysicsElectrostaticsActual

A charge 'Q' C is placed at the centre of a cube. The electric flux through two opposite faces of the cube is ( ₀ = permittivity of free space)

Options

  1. AQ 6 ₀
  2. BQ 3 ₀
  3. CQ ₀
  4. DQ 2 ₀

Correct answer

B. Q 3 ₀

Step-by-step solution

According to Gauss's law, the total electric flux through the cube is _ total = Q ₀ Since the charge is placed at the centre of the cube, the flux is symmetrically distributed across all six faces. The electric flux through a single face is ₁ = Q 6 ₀ The electric flux through two opposite faces is ₂ = 2 Q 6 ₀ = Q 3 ₀ Answer: Q 3 ₀

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