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Question

A charge q is placed at corner of a closed cube the flux related with any face of cube.
  1. Must be q80
  2. May be q0
  3. Must be zero
  4. May be zero

A
May be zero
B
Must be zero
C
Must be q80
D
May be q0
Solution
Verified by Toppr

Charge =q
must be q8ϵ0 because cube has 8 corners hence the charge is partially distributed q8.
Now, using Gauss's law,
the flux ϕ=q8ϵ0
(when ϵ0= permittivity of air =8.854×1012F/m

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