The condition under which a microwave oven heats up a food item containing water molecules most efficiently is:A. The frequency of the microwaves must match the resonant frequency of water moleculesB. The frequency of the microwaves has no relation with natural frequency of water moleculesC. Microwaves are heat waves, so always produce heatingD. Infra-red waves produce heating in a microwave oven

The condition under which a microwave oven heats up a food item contai

1.	The condition under which a microwave oven heats up a food item containing water molecules most efficiently is:A. The frequency of the microwaves must match the resonant frequency of water moleculesB. The frequency of the microwaves has no relation with natural frequency of water moleculesC. Microwaves are heat waves, so always produce heatingD. Infra-red waves produce heating in a microwave oven
Answer» Correct Answer - A In the presence of microwave water molecules oscillates the frequency of microwave and large heat is developed.

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