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Consider a uniform electric field E = 3 × 103 îN/C. (a) What is the flux of this field through a square of 10 cm on a side whose plane is parallel to the yz plane? (b) What is the flux through the same square if the normal to its plane makes a 60° angle with the x-axis?
Dear Sri
Flux φ=E.A
in first case E is along x axis and area vector is also along x axis since the area is parallel to yz plane
φ=EA*cos00=EA=3x103 x(0.1)2 = 30 Nm2/C
in second case
E is along x axis and area vector that is normal is making 60 with x axis
Φ=EA*cos600=EA/2=15 Nm2/C
All the best.
AKASH GOYAL
AskiitiansExpert-IIT Delhi
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