Microwave Technology and Principles

What are microwaves?

• A type of sound wave

• A form of energy used to heat food

• A type of chemical reaction

• A type of magnetic field

What is the approximate wavelength of a microwave?

• 12 meters

• 12 millimeters

• 12 centimeters

• 12 micrometers

Why do microwaves not cause cancer?

• They are too slow.

• Their photons do not possess enough energy.

• They are not a form of radiation.

• They only affect water molecules.

What is the core technology in a microwave oven that creates microwaves?

• Transformer

• Antenna

• Magnetron

• Stirrer

How does a magnetron generate electrons?

• By cooling a filament.

• By heating a filament with high voltage.

• By using a circular magnet.

• By absorbing microwaves.

How do microwaves primarily heat food?

• By directly transferring heat to the food's surface.

• By causing water molecules in the food to vibrate.

• By creating a chemical reaction within the food.

• By using infrared radiation.

What property of water molecules allows them to be affected by microwaves?

• Their ability to conduct electricity.

• Their positive and negative charged sides.

• Their large size.

• Their low water content.

Why do cold spots sometimes occur in microwave-heated food?

• The food is not rotated properly.

• Microwaves cancel each other out in certain areas.

• The microwave oven is not powerful enough.

• Foods with high water content absorb too much heat.