①\quad Q = I \times t = 6 \times 30 = 180(C)\quad (O)

②\quad I = \dfrac{\Delta Q}{\Delta t} = \dfrac{150}{15 \times 60} = \dfrac{1}{6}(A),\quadP = VI : \dfrac{1Wh}{\dfrac{1}{4}h} = V \times \dfrac{1}{6},\ V = 24(V)\quad (O)

③\quad \Delta Q = \dfrac{\Delta W}{V} = \dfrac{100}{10} = 10(C),\quadI = \dfrac{\Delta Q}{\Delta t} = \dfrac{10}{5} = 2(A)\quad (O)

④\quad q(t) = \int_{0}^{1}\left(\dfrac{t}{2}-1\right)dt = 0 , but 상계한 총 전하가 0일 뿐 통과한 전하는 존재한다. (X)

⑤\quad \Delta t = \dfrac{\Delta Q}{I} = \dfrac{6000}{20} = 300(s) = 5(\text{minutes})