In the gure four particles are xed along an x axis, separated by distances 0' = 3.20 cm. The charges are q1 = +4e, q2 = -e, q3 = +e, and q4 = +126, with e = 1.60 x 10'19 C. What is the value of the net electrostatic force on (a) particle 1 and (b) particle 2 due to the other particles? (3) Number I Units v (b) Number l Units v In the figure particle 1 (of charge +9.86 mC), particle 2 (of charge +9.86 mC), and particle 3 (of charge Q) form an equilateral triangle of edge length a. For what value of Q (both sign and magnitude) does the net electric field produced by the particles at the center of the triangle vanish? 2 Number i UnitsTwo particles are fixed to an x axis: particle 1 of charge q1 = 2.39 x 10-8 Cat x = 18.0 cm and particle 2 of charge q2 = -3.61q1 at x = 68.0 cm. At what coordinate on the x axis is the electric field produced by the particles equal to zero? Number UnitsThe figure shows an electric dipole. What is the magnitude of the dipole's electric field at point P? Assume that q = 6.35 x 10-6 C, d = 2.48 x 10-6 m, and r = 3.95 cm. + d/2 d/2 -4 e Number i UnitsThermal energy is produced in a resistor at a rate of 147 W when the current is 3.23 A. What is the resistance? Number I Units v