2013 NEET Electromagnetic WavesMicrowaves Easy Question 34 of 49 in Electromagnetic Waves

The condition under which a microwave oven heats up a food item containing water molecules most efficiently is:

A Infra-red waves produce heating in a microwave oven
B The frequency of the microwaves must match the resonant frequency of the water molecules
C The frequency of the microwaves has no relation with natural frequency of water molecules
D Microwaves are heat waves, so always produce heating

The answer is B.

Solution

A microwave oven heats food most efficiently when the microwave frequency matches the resonant frequency of water molecules, so that energy is transferred efficiently to them.

Concept Resonance in microwave heating

Electromagnetic Waves in past papers

49 questions from this chapter have appeared across 24 exam years.