NEET | 2013Heat TransferHard
Question
The condition under which a microwave oven heats up a food item containing water molecules most efficiently is :-
Options
A.Infra-red waves produce heating in a microwave oven
B.The frequency of the microwaves must match the resonant frequency of the water molecules
C.The frequency of the microwaves has no relation with natural frequency of water molecules
D.Microwaves are heat waves, so always produce heating
More Heat Transfer Questions
Temperature of the sun is 6050 K and emitted wavelength is 4753. If the emitted wavelength of the star is 9506 then its ...The temperature drop through layer furnace wall is 900oc. Each layer is of equal area of cross - section. Which of the f...Which of the following statements is false:...The ratio of the diameters of two metallic rods of the same metarial is 2 : 1 and their lengths are in the ratio 1 : 4. ...At 700 K temperatures the wavelength of maximum energy emitted by a body is 408 micron. If the temperature of body is in...