9.1.3—Q = It

For constant current, charge transferred in time t is Q=It; for changing current, use the area under an I–t graph.

Use seconds and coulombs, and state whether Q is magnitude or signed charge according to the chosen direction.

A 0.50 A current flowing for 4.0 minutes transfers Q=120 C.

Do not use minutes directly with amperes, and do not assume Q=It for a changing current without integrating or finding graph area.