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The condition under which a microwave oven heats up a food item containing water molecules most efficiently is
Options
(a) the frequency of the microwave must match the resonant frequency of the water molecules
(b) the frequency of the microwave has no relation with natural frequency of water molecules
(c) microwave are heat waves, so always produce heating
(d) infrared waves produce heating in a microwave oven
Correct Answer:
the frequency of the microwave must match the resonant frequency of the water molecules
Explanation:
Required condition: Frequency of the microwave = Resonant frequency of water molecules
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Topics: Electromagnetic Waves
(28)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A body rolls down a stair case of 5 steps. Each step has height 0.1 m and width 0.1m
- A p-n photodiode is made of a material with a band gap of 2.0 eV
- A particle of mass m is projected with velocity v making an angle of 45° with
- The intensity of magnetisation of a bar magnet is 5×10⁴ Am⁻¹. The magnetic length
- A remote-sensing satellite of earth revolves in a circular orbit at a height
Topics: Electromagnetic Waves (28)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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