If you don't have a magnetron in your microwave, the appliance will not be able to generate the microwaves needed for cooking or heating food. The magnetron is a crucial component in a microwave oven, as it converts electrical energy into electromagnetic waves, specifically microwave radiation.
Without a magnetron, the microwave oven will lose its primary method of heating food. Instead, the microwave would function as a regular oven, relying on the conventional heating elements to cook or heat food. Conventional ovens use a combination of convection, conduction, and radiation from heating elements to cook food, which is different from the rapid and efficient heating achieved with microwave radiation.
Microwave ovens are designed to work with the specific properties of microwaves to penetrate the food, causing the water molecules inside it to vibrate and generate heat through friction. This process allows food to cook more quickly and evenly than traditional ovens.
Therefore, if the magnetron is missing or not functioning in a microwave oven, it will lose its unique microwave cooking capabilities and essentially become a standard oven, relying solely on the conventional heating elements for cooking.