Question

Explain the working principle of microwave oven.

Hint:

Microwave ovens heat food by using microwaves to excite water molecules, generating heat internally.

Answer 1

A microwave oven cooks food using microwave radiation, which causes water molecules in the food to vibrate and generate heat internally. Working Principle:

The microwave oven contains a magnetron, which generates microwaves at a frequency of about 45 GHz.
These microwaves are directed into the cooking chamber where the food is placed.
Microwaves penetrate the food and cause polar water molecules and other dipolar molecules to oscillate rapidly.
The molecular friction generates heat uniformly throughout the food, cooking it from inside out.
The oven is equipped with a rotating turntable to ensure even exposure to microwaves.
Advantages: Quick heating, energy efficiency, and ability to cook food without heating the oven cavity significantly.