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Consider a uniform electric field E = 3 × 10^3 î N/C. What is the flux through the same square if the normal to its plane makes a 60° angle with the x axis?

Q 1.15(b) Consider a uniform electric field E=3 \times 10^{3}\ \widehat{i}\ N/C .What is the flux through the same square if the normal to its plane makes a 60^{\circ} angle with the x-axis?

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Now, Since the normal of the square plane makes a 60^{\circ} angle with the x-axis

cos\Theta = cos(60^{0}) = 0.5

Therefore, flux through this surface:

\phi = E.A = EAcos\Theta

\implies \phi = (3\times10^3)(0.01)(0.5) Nm^2/C = \boldsymbol{15\ Nm^2/C} 

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