Night-vision goggles enable humans to see light in the infrared range of the electromagnetic spectrum. What else other than night-vision goggles does this? A) RIFD chip
B) UV sensors
C) Thermogram
D) Video camera

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.