Question

Potential Field Part A The lines show the equipotential contours in the plane of three point charges, Q1, Q2, and Q3. The values of the potentials are in kv as indicated for the +5, 0, and -5 kV contours. The positions of the charges are indicated by the dots Q2 olts 5 Qa 2 3 The letters are on the equipotential contours.

Calculate the size of the force on a charge of 9.60 x 10^-19 C at g?

Calculate the size of Q3 . The magnitudes of three charges are in the exact ratios of 1 to 2 to 3?

For review purposes I need this problem worked out and explained .

Answer 1

"Before we come to the solution, note few things: The ""contours"" are ""Equipotential"" lines in the plane of charge. This means that V = constant if a charge move along such a line For a positive charge/negative charge, the contour are respectively positive or negative In electrostatics, E = - nabla V, where E is the electric field due to system of Therefore, q,0 = 0. Hence at a contour where v = 0 Rightarrow f = 0, iR. No force is felt * coming to the solution: since, (please see figure) 'g' is on the contour where v = 0"