User Manual Westinghouse WHI644BA 60cm Induction Cooktop

Yes you are able to change from gas to electric " Induction" cooktop, first, Select a model that you are interested in, then I would look at the cutout required for the new cooktop compared with your current cooktop, as the cutout requirements are all different nothing is standard, then have an electrician provide a costing on running a separate electrical line from your powerboard outside to where the cooktop will be installed, your cooktop must be on its own circuit, your current electrical power to you gas cooktop will not be suitable. "Upgrade power required". Also, a gas technician is required to disconnect the current gas cooktop as the electrician is unable to provide that type of service. Best to contact a couple of tradespeople in your area who could provide you with a quote for that type service.

You are correct, induction cooktops heat the cookware not the surface, however because of the heat created in the pan, some heat is transferred back from the metal base of the cookware to the glass cooking surface. Although there is much less residual heat, there is still an indicator on most induction cooktops, so you can safely tell the surface was recently used.