No, it is not safe to microwave water in a kettle that is not specifically designed for microwave use. Traditional stovetop kettles or electric kettles with metal components, including metal handles or metal lids, should not be placed in a microwave.
Microwaves work by emitting microwaves that are absorbed by water molecules, causing them to vibrate and generate heat. When a microwave-safe container is used to heat water in a microwave, the container itself does not get excessively hot because it is designed to withstand the microwave's energy. However, metal objects, such as those found in traditional kettles, can cause arcing (sparks) and create a fire hazard when placed in a microwave.
To safely heat water in a microwave, it is recommended to use a microwave-safe container, such as a glass or ceramic bowl or a microwave-safe plastic container labeled as such. Always follow the manufacturer's instructions and guidelines for safe microwave use.