1. Two particles are fixed to an x-axis:
Particle 1 has a charge q1 = 1.64 Ă— 10^-8 C at x = 20.0 cm, and
Particle 2 has a charge q2 = -5.76q1 at x = 60.0 cm.
At what coordinate on the x-axis is the electric field produced by the particles equal to zero?
2. The figure shows an electric dipole. What is the magnitude of the dipole's electric field at point P?
Assume that q = 7.77 Ă— 10^-6 C, d = 8.87 Ă— 10^-6 m, and r = 4.94 cm.