Yes, you can use a microwave oven to boil water instead of using an electric or gas stove top. Microwaves can effectively heat water due to the excitation of water molecules, causing them to vibrate and generate heat.
The time required to boil one liter of water in a microwave oven can vary based on the wattage of your microwave and the starting temperature of the water. However, as a general guideline, it usually takes around 2 to 3 minutes to boil one liter of water in a typical 1000-watt microwave.
Keep in mind that the actual time may vary, so it's essential to monitor the water closely to avoid overheating. Additionally, be cautious when handling the heated water to prevent burns or spills. Always use microwave-safe containers and follow the manufacturer's guidelines for boiling water in your specific microwave model.