AIPMT 2013 Physics and Chemistry Paper

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Question : 28 of 90

Marks: +1, -0

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

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
Microwaves are heat waves, so always produce heating

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