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NCERT Class XII Chapter
Electric Charges and Fields
Questions With Solutions

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Question : 19
Total: 34
A point charge of 2.0 μC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the net electric flux through the surface?
Solution:  
ϕ =
q
ε0
 =
2×10−6
8.85×10−12
 = 0.23 × 106
or ϕ = 2.3 × 105 N m2C−1
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