Question

In: Physics

Given the two charged particles shown in the figure below, find the electric field at the...

Given the two charged particles shown in the figure below, find the electric field at the origin. (Let q1 = −26.00 nC and q2 = 7.00 nC.  Express your answer in vector form.) q1 is at (2,4) and q2 is at (-2,3)

Solutions

Expert Solution

The position vectors of origin w.r.t each particle can be given as

r1 = -2 - 4

r2 = 2 - 3

Now electric field by a charged particle is given as E = kq/r3  , k = 1/4 = 9 x 109

Which means that

E1 = kq1r1/|r1|3 = 9 x 109 x (-26 nC) x (-2 - 4)/(22 + 42)3/2 = 5.2324 + 10.4648 N/C

E1 = kq1r1/|r1|3 = 9 x 109 x (7 nC) x (2 - 3)/(22 + 32)3/2 = 1.344(2 - 3) = 2.688 - 4.032 N/C

Net electric field on origin can be given as E = E1 + E2 = 7.92 + 6.4328


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