Four charges are placed at the corners of a square:

Question

Question

Four charges are placed at the corners of a square:

-2.0 nc at (0, 0)

-4.0 nC at (0, 2.0 cm)

2.0 nC at (2.0 cm, 2.0 cm)

-4.0 nC at (2.0 cm,0).

a. What is the electric field at the center of the square?

b. What is the force exerted on an electron placed at the center of the square?

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Answer 1

Answer #1

Concept: here the fields at center due to two -4nC charges cancel out and hence we simply add the field due to -2nC and 2nC as they are both in the same direction and we get the net field.

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Answer 2

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