Homework Statement
Y
-----------1----2-----3------4
x---1----1/4----0-----0------0
----2----1/8----1/8---0------0
----3----1/12---1/12--1/12---0
----4----1/16---1/16--1/16--1/16
The Joint PMF of random varables X and Y is given in the table above
Let...
Homework Statement
Infinite unknown line charges of 5nC/m lie along the (positive and negative) x and y axes in free space. Find E at P(0,0,4)
Homework Equations
E = (pl/2(pi)(eo)p)ap
pi = 3.14...
eo - permitivity of free space 8.854 x 10^-12
pl = line charge density
ap = unit...
Homework Statement
In free space, Q1 = 10nc at P1(0,-4,0) and Q2 = 20nC at P2(0,0,4).
a. Find E at the origin (answered)
E(r) = 5.617ay - 11.235az
b. Where should a 30nC point charge be located so E=0 at the origin? (need help)
Homework Equations
E(r) = (1/4(pi)epsilon) sum...