The electric field is constant over each face of the tetrahedron shown in (Figure 1). Does the box contain positive charge, negative charge, or no charge? Positive charge. Since there is a net electric flux passing inward through the surface of the closed box, it contains positive charge. Negative charge. Since there is a net electric flux passing inward through the surface of the closed box, it contains negative charge. Positive charge. Since there is a net electric flux passing outward through the surface of the closed box, it contains positive charge. Negative charge. Since there is a net electric flux passing outward through the surface of the closed box, it contains negative charge. No charge, because the flux into the box is canceled by the flux out of it. Submit Request Answer Provide Feedback Figure 1 of 1 > 10 Field strengths in N/C 15