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Concepts Of Physics MCQ Edition [Volume 2]PhysicsGauss's Law

Determine the net charge in a region in which the electric field is uniform at all points.

Options

  1. AZero
  2. BDepends on the magnitude of the electric field
  3. CPositive
  4. DNegative

Correct answer

A. Zero

Step-by-step solution

According to Gauss's law, the net electric flux through any closed surface is given by E d A = q_ net ₀ . Since the electric field E is uniform at all points in the region, it is a constant vector. The net flux through any closed surface in this region is E d A . For any closed surface, the vector sum of the area elements is zero, i.e., d A = 0 . Thus, the net flux is zero, which implies q_ net = 0 . Alternatively, using the differential form of Gauss's law, E = ₀ . Since E is constant, its divergence is zero, givi

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