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Microwaves are one of the most essential appliances in many kitchens, used every day to warm up leftovers and defrost foods. They’re also the method of choice for heating Lean Cuisine entrees, warming Orville Redenbacher bags of popcorn, and melting butter or chocolate. Some people even know how to cook whole meals in microwaves (a trend back in the ’80s).
Inside the microwave are an electrical circuit and a magnetron, which generates electromagnetic waves that heat food. The waves bounce off the magnetron and turntable, then hit food molecules in the cooking cavity and force them to rotate, producing friction that heats the food.
A control panel sits beside the microwave door and includes a set of buttons that allow you to preset cooking times and modes such as defrost or quick heat. You can even choose to have the oven preheat or defrost automatically. It’s important to keep in mind that these presets aren’t the same as setting your own times and power levels, so we wouldn’t recommend choosing a new microwave solely on the basis of preprogrammed modes.
A lot of manufacturers make microwaves, from top-tier brands such as Panasonic and Samsung to midrange choices like Toshiba and LG. And then there’s the bargain-basement microwaves, which are often sourced from the same factories as the more expensive models. We’ve spotted some cheap microwaves that say “Made by Galanz” on the back, but import records show that most of these low-cost models are made by the Chinese company Midea.