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The condition under which a microwave oven heats up a food item containing water molecules most efficiently is:A. Infra-red wave produce heating in a microwave ovenB. The frequency of the microwave must match the resonant frequency of the water moleculesC. The frequency of the microwave has no relation with natural frequency of water moleculesD. Microwave are heat waves, so they always produce heating |
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Answer» Correct Answer - b For efficient working of microwave oven, the frequency of microwave must match the resonant frequency of the water molecules, then maximum heating is produced. |
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