Question

Assignment 2 Exercise 21.40 く) 13of15 Constants Part A A-3.50 sC point charge is at the origin, and a second -600 nC point charge is on to Nos at z Find the electric field (magnitude and direction) at point on the z-axis at r -0200 m Express your answer with the appropriate units. Enter positive value if the field is in the positive z-direction and negative value if the field is in the negative a-direction. 525 Submit Previous Amwers Request Answer X Incorrect; Try Again: 3 attempts remaining

Answer 1

a) E = k Q / r²

E = 9 * 10⁹ * [-3.5/0.2² + 6/(0.800-0.200)²] * 10^-9

= -637.5 N/C

direction is towards left or negative x direction

b) E = k Q / r²

E = 9 * 10⁹ * [-3.5/1.2² - 6/(1.2-0.8)²] * 10^-9

= -359 N/C

direction is towards left or negative x direction

c) E = k Q / r²

E = 9 * 10⁹ * [3.5/0.2² + 6/(0.8+0.2)²] * 10^-9

= 841.5 N/C

direction is towards right or positive x direction