Physics

Problem

Through a wire,

4.0\,\text{C}

of charge move from point B to point A in

2.0\,\text{s}

. If current direction is taken positive from A to B, the average current is a)

+8\,\text{A}

+2\,\text{A}

-2\,\text{A}

-4\,\text{A}

Intuitive explanation

Current measures how much charge flows past a point per unit time, but direction matters—it's a signed quantity. Since charge is moving from B to A (opposite to your chosen positive direction A→B), the current will be negative. Calculate the magnitude using $I = Q/t$ , then apply the sign convention to get your final answer.

Intuitive explanation

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