Where the movement is hindered
Diagnosis: a contact that heats up, or a cell that no longer delivers in the cold — say which movement of charges is hindered, and where.
Exercises
Three levels: the bare notion, the application, the reasoning. Calculations, true-or-false and choices are checked here; for an essay, you read the answer and judge yourself.
7 exercises0 of 7
The application 4 exercises
The reasoning 3 exercises