It will be a negative e.g -2+-2=-4
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The answer is positive 9. Negative plus negaitve is a positive.
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b (A+)
Electrical current in copper is the flow of electrons which are negaitve charge particles. In a typical battery, electrons flow from the negative (bottom) side to the positive (top, nipple) side. However, the engineering convention is to call the "plus" side of the battery the source so current is said to flow from the plus side to the negative side -- which is the opposite to the physical flow of electrons.
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