Three charges q 1 = 1 × 10 –6 , q 2 = 2 × 10 –6 , q 3 = –3 × 10 –6 C have been placed, as shown in figure, in four surfaces S 1 , S 2 , S 3 and S 4 electrical flux emitted from the surface S 2 in N–m 2 /C will be -
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Verified by ExpertsThe correct answer is:
B
As the flux is due to all the charges present inside the gaussian surface. hence flux through S 2 ,
or 
or 
or 
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