C: E&M · Unit 1: Electrostatics
Field and Potential of Point Charges
Two point charges are fixed on the x-axis: q₁ = +4.0 nC at x = 0 and q₂ = −4.0 nC at x = 0.20 m. Use k = 9.0×10⁹ N·m²/C².
(a)2 points
Calculate the field magnitude at the midpoint (x = 0.10 m) due to q₁.
(b)2 points
State the direction of the net field at the midpoint and justify.
(c)3 points
Calculate the electric potential at the midpoint.