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B
The inverse square law were not exactly true
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C
The velocity of light
were not a universal constant
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D
None of these
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Solution
The correct option is B
The inverse square law were not exactly true
If the inverse square law were not true, Electric field would not decrease in proportion to increase in surface area of a sphere(with increase in radius.)
Eα1r2 Aαr2
So ϕ does not change if the gaussian surface changes.