5. The following statements about the properties of an equipotential surface are true, except * A. the potential difference between any points on an equipotential surface is zero. B. the electric field at every point outside of an equipotential surface is at right angle to the surface. C. work is required to move a charge at a constant speed on an equipotential surface. D. all points on an equipotential surface are at the same potential. 6. A battery with a terminal voltage of 11.95 V when delivering 0.5 A current has an internal resistance of 0.1 Q . Calculate the emf. * A. 11.90 V B. 11.95 V C. 12.00 V D. 12.50 V 7. A Gaussian surface encloses a charge of 2 uC. Calculate the electric flux through the surface. (Given the permittivity of free space, Eo = 8.85 x 10 12 C2/Nm?) * A. 1.77 x 10717 Nm2/C B. 4.45 x 10 Nm2/C C. 1.83 x 103 Nm2/C D. 2.26 x 10s Nm2/C