Understanding Microwaves

What is the approximate wavelength of microwaves?

• 100 nanometers

• 12 centimeters

• 1 meter

• 1 kilometer

Why are microwaves unable to cause cancer?

• They are absorbed by the skin

• They are too small to penetrate cells

• They lack sufficient energy per photon

• They are reflected by the body

What is the primary component in a microwave oven that generates microwaves?

• Transformer

• Anode

• Filament

• Magnetron

What is the role of the circular magnet in a magnetron?

• To bend electrons back towards the filament

• To focus microwaves

• To increase voltage

• To cool down the magnetron

How do microwaves cause food to heat up?

• By directly heating the food surface

• By increasing the air temperature

• By emitting infrared radiation

• By causing water molecules to vibrate

What characteristic of water molecules makes them interact with microwaves?

• They are electrically neutral

• They have a magnetic field

• They are polar with positive and negative sides

• They are larger than other molecules

Why do microwaves heat food faster than conventional methods?

• They use convection currents

• They focus on the food's surface

• They cook food from the inside out

• They use higher temperatures

What causes cold spots in microwaved food?

• Food being too dense

• Low power settings

• Uneven food distribution

• Microwaves canceling each other out

How do modern microwaves address the issue of cold spots?

• By using a spinning platter

• By increasing power

• By using infrared sensors

• By reducing cooking time

What happens when a microwave's positive and negative sides meet?

• They amplify the wave

• They create a new wave

• They reflect off each other

• They cancel each other out