Three point charges are arranged along the -axis in the following order: • Charge at…
PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
Three point charges are arranged along the y-axis in the following order:
• Charge +2.0μC at y=0m
• Charge +2.0μC at y=0.30m
• Charge −8.0μC at y=0.90m
(a) Write an expression for the y-component of the net electric field Ey(y) at an arbitrary point on the y-axis produced by the three charges.
(b) Determine all positions on the y-axis where the net electric field is zero. Show all algebraic steps leading to your numerical result(s).
(c) For each position you found in part (b), indicate whether it lies between any two of the charges or outside the outermost charges, and briefly discuss the physical reason such a location can or cannot exist in that region.