A charge of -5.0 nC is at theorigin and a second charge of 7.0 nC is at x =4.00

Question

A charge of -5.0 nC is at theorigin and a second charge of 7.0 nC is at x =4.00 m. Find the magnitude anddirection of the electric field halfway in between the twocharges. magnitude ____________N/C (According to the textbook the correct answer is 27.0 N/C;negative x-direction) I can't find how this answer wasachieved??? A charge of -5.0 nC is at theorigin and a second charge of 7.0 nC is at x =4.00 m. Find the magnitude anddirection of the electric field halfway in between the twocharges. magnitude ____________N/C magnitude ____________N/C (According to the textbook the correct answer is 27.0 N/C;negative x-direction) I can't find how this answer wasachieved???

Explanation / Answer

A charge of -5.0 nC is at theorigin and a second charge of 7.0 nC is at x =4.00 m. Find the magnitude anddirection of the electric field halfway in between the twocharges. magnitude ____________N/C magnitude ____________N/C (According to the textbook the correct answer is 27.0 N/C;negative x-direction) I can't find how this answer wasachieved???
E=9*109*10-9/2*2[5+7]{ as the electric fieldis vector and due to both the charges having the directiontowards negative X axis }
E=108/4=27N/C direction towards negative X direction.

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