A cube of side 0.20 m is placed in a uniform electric field of magnitude 500 N/C directed along the +y–axis. What is the net electric flux through the cube?
Answer
0 N·m²/C
The correct answer is 0 N·m²/C — Therefore, the net flux through the cube is 0 N·m²/C.
Step-by-step solution
- The cube is a closed surface; Gauss’s law states that the total electric flux through a closed surface equals the enclosed charge divided by ε₀. Since no charge is enclosed, the total flux must be zero.
- Therefore, the net flux through the cube is 0 N·m²/C.
Common mistake: Adding the contributions of the six faces without realizing the contributions cancel
Concept tested: Gauss’s law – net flux through closed surface with no enclosed charge
Published · How this solution was prepared and checked
← All Electric Charges and Fields questions