An electrochemical cell contains an aqueous solution of zinc sulfate (an electrolyte). This cell is connected in series with a silicon diode (a semiconductor).
Which row in the table correctly identifies the charge carriers responsible for the current in the electrolyte and in the semiconductor?
| Charge carriers in the electrolyte | Charge carriers in the semiconductor | |
|---|---|---|
| A | Free electrons and positive ions | Electrons and holes |
| B | Positive and negative ions | Electrons only |
| C | Positive and negative ions | Electrons and holes |
| D | Free electrons only | Electrons and holes |
Row A
Row B
Row C
Row D
5 exam-style questions on OCR A A Level Physics Charge and current, covering Charge and Mean drift velocity. Each one has a worked solution and a mark scheme showing where the marks go.