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Consider the symmetrically arranged charges in the figure, in which ga = %= -1.85 C and q = = +1.85 C. Determine the directio
Oright O up and right Odown O up and left down and left Calculate the magnitude of the electric field E at the location of a
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Answer #1

a)

option (b) up is correct

====

b)

field due to qa and qd

Ead = k ( q1 + q2) / ( a^2/2)

Ead = 9* 10^9* 10^-6* ( 1.85* 2) / ( 0.0675^2 /2)

Ead = 1.4617* 10^7 N/C

field due to qb and qc

Ebc = Ead = 1.4617* 10^7 N/C

diagonals of square bisects each other at right angles

hence angle between Ebc and Ead

x = 90

net field at q

E^2 = Ebc^2 + Ead^2

E = 2.067* 10^7 N/C

======

Comment before rate in case any doubt, will reply for sure.. goodluck

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