Question Detail
Question
The electric flux emerging from a rectangular surface of area 0.025m² is 10 N·m²/C. If the field lines are normal to the surface, determine the electric field strength.
Correct Answer
Option D is the correct answer.
Detailed Explanation
Since Φ = EA when the field is normal to the surface, E = Φ/A = 10/0.025 = 400 N/C (equivalently V/m).
Hint
Since the field is normal to the surface, flux simplifies to Φ = EA — just divide flux by area.