The electric field is always directed from the positive charge to the negative charge.
Four point charges of equal magnitude are arranged at the corners of a square as shown in the figure. Positive charges are indicated by "+" and negative charges are indicated by "-".
What is the direction of the electric field at point b?
A. To the left.
B. To the right
C. Down (to the bottom of the page).
D. The electric field is zero at this point.
E. Up (to the top of the page).
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What scientific concept do you need to know in order to solve this problem?
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