If both charges are positive, the force will be repulsive; similarly, if both charges are negative, the force will be the same.
If one charge is positive and another is negative, the force will be attractive.
How does changing the direction of the charge (positive/negative) influence the force between the two charges?
If both charges are positive, the force will be _________; similarly, if both charges are negative, the force will be the same.
If one charge is positive and another is negative, the force will be ___________.
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