Thank you for your message. I think cooktop is the translation for table de cuisson. A plaque de cuisson is one of the individual burners/hotplates on the cooktop. However, I see that the English to French dictionary has plaque de cuisson as the translation for cooktop, so I'm going to pass this report to them to check if that needs changing.
@DearPrudence I'm pretty certain cooktop should be table de cuisson, not plaque de cuisson.