AP EAMCET · PHYSICS · Electrostatics
The net electric flux due to a uniform electric field of \(3 \times 10^3 \hat{1} \mathrm{NC}^{-1}\) through a cube of side \(20 \mathrm{~cm}\) oriented such that its faces are parallel to the coordinate planes is
- A \(30 \mathrm{Nm}^2 \mathrm{C}^{-1}\)
- B \(15 \mathrm{Nm}^2 \mathrm{C}^{-1}\)
- C \(0\)
- D \(20 \mathrm{Nm}^2 \mathrm{C}^{-1}\)
Answer & Solution
Correct Answer
(C) \(0\)
Step-by-step Solution
Detailed explanation
Uniform electric field, \(\mathrm{E}=3 \times 10^3 \hat{\mathrm{i}} \mathrm{N} / \mathrm{C}\) side of cube, \(a=20 \mathrm{~cm}=0.20 \mathrm{~m}\) Four face makes the angle between area vector and electric field is \(90^{\circ}\). \(\phi=(\mathrm{EdA} \cos 90) \times 4=0\) One…
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