a) (1.) An equipotential line surrounds a charge distribution of known value (35 mC). Two points A and B are selected on this equipotential line separated by 3.0 cm. What is the potential difference DV between these points?
b) 2.) Two equipotential lines surround a charge distribution of known value (35 mC). The equipotential line closest to the charge distribution has a potential of 10 V; the outer equipotential line has a potential of 15 V. At the points of closest separation between the lines, the distance between the lines is 0.25 cm. What is the average electric field strength between the points of closest separation?