Given 5 charges all of which have the same magnitude q. Three of the charges are

Question

Given 5 charges all of which have the same magnitude q.  Three of the charges are postive and the other two are negative.

Pick any four of the five charges and place them at each corner (one charge per corner) of the square so that the total electric field at the center of the square points toward corner B, and calculate the magnitude of E (Magnitude ( E ) = k(Q)/r²) at the cener.

Would the setup charges +,-,+,+ in clockwise points toward corner B?

Would the magnitue of E be = ((sqrt 2)/2)) * k/r2 *4q => (2 * (sqrt2)) * kq/r2  ?

Explanation / Answer

the magnitude is 6

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