Class 12 NEET Physics Electromagnetic Waves Questions

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Question : 25 of 51

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

(2013 NEET)

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

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