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

AIPMT 2013
A

The frequency of the microwaves must match the resonant frequency of the water molecules

B

The frequency of the microwaves has no relation with natural frequency of water molecules

C

Microwaves are heat waves, so always produce heating

D

Infra-red waves produce heating in a microwave oven

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