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The condition under which a microwave ov...

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

A

The frequency of the microwave 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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A
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AAKASH SERIES-ELECTROMAGNETIC WAVES-EXERCISE -IA
  1. Ozone layer absorbs all such radiation whose wavelengths are

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  2. A radiation of energy E falls normally on a perfectly reflecting surfa...

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  3. The type of electromagnetic wave propagation which is effected as a re...

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  4. X-rays are known as to be electromagnetic radi­ation. Therefore the X-...

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  5. The altitude of the ozone layer in the atmosphere and the ‘type’ of th...

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  6. Four atmospheric layers are given below, namely (i) stratosphere (ii) ...

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  7. Infrared radiation is detected by

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  8. Finger prints on a piece of paper may be detected by sprinkling fluore...

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  9. The atmosphere above the height of 80 km is called

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  10. The frequency from 3Hz to 30MHz is known as

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  11. The frequency from 3xx10^(9) Hz to 3xx10^(10) Hz is

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  12. A cube of edge a has its edges parallel to X, Y and Z -axis of rectang...

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  13. Green house effect is due to

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  14. One requires lleV of energy to dissociate a carbon monoxide molecule i...

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  15. The ration of contributions made by the electric field and magnetic fi...

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  16. An EM wave radiates outwards from a dipole antenna, with Eo as the amp...

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  17. A variable frequency a.c source is conneced to a capacitor. How will t...

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

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  19. Match List-I (Electromagnetic wave type) with List-II (Its association...

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  20. Electromagnetic waves with wavelength lambda(1) is used in satellite ...

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