Direct-current arcs are “hotter” and harder to extinguish than alternating- current arcs, so electrical appliances that include a thermostat are frequently marked for use on “AC only.” One appliance that might be so marked because it includes a thermostat is a

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Direct-current arcs are “hotter” and harder to extinguish than alternating- current arcs, so electrical appliances that include a thermostat are frequently marked for use on “AC only.” One appliance that might be so marked because it includes a thermostat is a