Which row in the table below correctly describes the potential difference for an electric kettle connected to the domestic mains and for a battery-operated toy car?
| Electric kettle | Battery-operated toy car | |
|---|---|---|
| A | 230 V d.c.230\text{ V d.c.}230 V d.c. | 9 V a.c.9\text{ V a.c.}9 V a.c. |
| B | 9 V a.c.9\text{ V a.c.}9 V a.c. | 9 V a.c.9\text{ V a.c.}9 V a.c. |
| C | 230 V a.c.230\text{ V a.c.}230 V a.c. | 9 V d.c.9\text{ V d.c.}9 V d.c. |
| D | 9 V d.c.9\text{ V d.c.}9 V d.c. | 230 V d.c.230\text{ V d.c.}230 V d.c. |
Row A
Row B
Row C
Row D