Question

Question 1 8.0 nc 10 nC -10 nC In the figure above, a 29.3 cm and b 7.65 cm. What is the magnitude of the force on the -10 nC charge? Question 2 Consider two charges, where one (+2.80 nC) is at the origin and the other (7.84 nC) is at the position Find the x-coordinate where a proton would experience zero net force Answer 4.21 cm.

Q.1 In the figure above, a = 29.3 cm and b = 7.65 cm. What is the magnitude of the force on the -10 nC charge?

Q.2 Consider two charges, where one (+2.80 nC) is at the origin and the other (-7.84 nC) is at the position x = 4.21 cm.

Find the x-coordinate where a proton would experience zero net force.

Answer 1

F_1 = k(10 nl) (+ 10 nl)/a^2 = 9 times 10^9 times 10 times 10^- 9 times 10 times 10^- 9/(0. 293)^2 F_1 = 10. 5 times 10^- 6 N F_2 = k(10 nl) (8 nl)/b^2 = 9 times 10^9 times 10 times 10^- 9 times 8 times 10^- 9/(7. 65)^2 times 10^- 4 F_2 = 123 times 10^- 6 N Magnitude of resultant = squareroot (10. 5)^2 + (123)^2 times 10^- 6 = 123. 4 times 10^- 6 N P_0 x 1 2 + 2. 8nc 4. 21 cn - 7. 84 nc Let at point P is net force zero, At P net electric field should be zero E_1 = k(2. 8 nc)/x^2 times 10^- 4 E_2 = k(- 7. 84nc)/(4. 21 + x)^2 times 10^- 4