Question

Problem 3 - Electric force and Electric field I. [8 points) In the figure below the charge in the middle is Q = -3.0 nC. For what charge qı will the force on a positive charge qz be zero? (Indicate whether qıhas to be positive or negative charge.) 1nC = 10-°C, Coulomb's constant k = 9.0 x 10°N·m2/c2 0 42 10 cm 10 cm II. [12 points] A +5.0-uC point charge is placed at the 0 cm mark of a meter stick and a -4.0-uC charge is placed at the 50 cm mark. 1°C = 10-6C, Coulomb's constant k = 9.0 x 10°N·m²/C2 a. What is the net electric field at the 30 cm mark? b. What is the net electric field at the 80 cm mark? c. At what point on a line through the ends of the meter stick is the electric field equal to zero?

Answer 1

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