Yes, it is essential to put water in an empty can before putting it in the microwave oven. Never place an empty can or any closed container without an opening in the microwave. This is because when an empty can or sealed container is heated in the microwave, pressure can build up inside due to the steam generated from any residual liquid or moisture present in the can or container.
As the pressure increases, the can or container may explode or rupture, leading to a potentially dangerous situation. The force of the explosion can cause hot contents to splatter, resulting in burns or other injuries, and it can also damage the microwave oven.
To avoid any hazards, follow these precautions when using a microwave:
Never microwave a sealed container or an empty can.
If you are heating food in a can, transfer the contents to a microwave-safe container before heating.
For foods that have a tendency to splatter or release steam, cover the container with a microwave-safe lid or microwave-safe plastic wrap with a small vent opening.
Stir liquids and foods periodically during microwaving to ensure even heating and prevent hot spots.
Use microwave-safe containers made of glass, ceramic, or microwave-safe plastics when heating or cooking food in the microwave.
By following these guidelines, you can safely use your microwave oven for heating and cooking without the risk of accidents or damage.