Saved Bookmarks
| 1. |
A point charge `q = - 8.0 nC` is located at the origin. Find the electric field vector at the point `x = 1.2 m, y = -1.6 m. `A. `-14.4hat i+10.8hat j`B. `-14.4hat i-10.8hat j`C. `-10.8hat i+14.4hat j`D. `-10.8hat i-14.4hat j` |
|
Answer» Correct Answer - C `vec(E ) = (1)/(4 pi epsilon_(0)) (q)/(r^(2)) hat r` `hat (r ) =(vec(r ))/(r )=((1.2-0)hat(i)+(-1.6-0)hat j)/(sqrt((1.2)^(2)+(1.6)^(2)))` `=(1)/(2)(1.2 hat(i)-1.6 hat(j))` `vec(E )=9xx10^(9)xx((-8xx10^(-9)))/(2^(2))xx(1)/(2)(1.2 hat(i)-1.6 hat(j))` `=-10.8 hat(i)+14.4hatj`. |
|