A steady current of 0.50 A flows through a wire. How much charge passes through the wire in one minute?
Because $I=q / t$, it follows that $q=I t=(0.50 \mathrm{~A})(60 \mathrm{~s})=30 \mathrm{C}$. (Recall that $1 \mathrm{~A}=1 \mathrm{C} / \mathrm{s}$.