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How Can I solve this problem? Three charges, q1= -10 μC, q2= 4 μC and q3=...

How Can I solve this problem?

Three charges, q1= -10 μC, q2= 4 μC and q3= 10 μC are aligned vertically, 6 cm apart. Point P is located 8 cm directly to the right of q2.

a) Find the electric field contribution from q1 on point P.

b) Find the electric field contribution from q2 on point P.

c) Find the electric field contribution from q3 at point P.

d) Find the magnitude of the net electric field at point P due to all three charges.

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