Home
Class 12
PHYSICS
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 microwave has no relation with natural frequency of water molecules

C

microwave are heat waves, so always produce heating

D

infrared wave produce heating in a microwave oven

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC WAVES

    DC PANDEY ENGLISH|Exercise Match the columns|2 Videos
  • ELECTROMAGNETIC INDUCTION

    DC PANDEY ENGLISH|Exercise Medical entrances gallery|25 Videos
  • ELECTROSTATIC POTENTIAL AND CAPACITORS

    DC PANDEY ENGLISH|Exercise (C) Chapter exercises|50 Videos

Similar Questions

Explore conceptually related problems

Why does microwave oven heats up a food item containing water molecules most efficiently?

The conditions under which transpiration would be most rapid are

If X is the total number of collisions that a gas molecule registers with other molecules per unit time under particular conditions, then what is the collision frequency of the gas containing N molecules per unit volume is ?

A vertical cylinder of cross-section area A contains one mole of an ideal mono-atomic gas under a piston of mass M At a certain instant a heater which supplies heat at the rate q J//s is switched ON under the piston. The velocity with which the piston moves upward under the condition that pressure of gas remains constant is [Assume on heat transfer through walls of cylinder]

Two gaseous molecules A and B are traveling towards each other. Let the mean free path of the molecule be sigma and Z be the collision number with other molecules at pressure 1 atm . Answer the following questions If Z is the total number of collisions which a gas molecule registers with others per unit time under particular conditions, then the collision frequency of the gas containing N molecules per unit volume is

A : If dipole moment of water molecules were zero, then microwave cooking would not be possible. R : In a microwave oven the water molecules vibrate due to oscillating electric field in microwave and heat the food.

Assertion : One should not use metal containers in a microwave oven Reason : Only because metal may melt form heating.

A shipping company employee is in charge of packing cargo containers for shipment. He knows a certain cargo container can hold a maximum of 50 microwaves or a maximum of 15 refrigeratiors. Each microwave takes up 6 cubic feet of space, and each refrigerator takes up 20 cubic feet. The cargo container can hold a maximum of 300 cubic feet. The employee is trying to figure out how to pack a container containing both microwaves and refrigerators. Which of the following system of inequalities can the employee use to determine how many of each item (microwaves, m, and refrigeratios, r) he can pack into one cargo container ?

An ice cube of mass 0.1 kg at 0^@C is placed in an isolated container which is at 227^@C . The specific heat s of the container varies with temperature T according to the empirical relation s=A+BT , where A= 100 cal//kgK and B = 2xx (10^-2) cal//kg . If the final temperature of the container is 27^@C , determine the mass of the container. (Latent heat of fusion for water = 8xx (10^4) cal//kg , specific heat of water =10^3 cal//kg-K ).

Acid base theories are important to understand the role of many substances in different reactions. Different theories are in practice which have advantages as well as limitations at their level. We always consider most convenient theory under the given conditions. Which of the following is strong conjugate base

DC PANDEY ENGLISH-ELECTROMAGNETIC WAVES-Sec C
  1. The electric vector vibration of an electromagnetic wave is given by E...

    Text Solution

    |

  2. Which radiations are used in treatment of muscles ache?

    Text Solution

    |

  3. In the case of linearly polarized light, the magnitude of he electric ...

    Text Solution

    |

  4. A leaf which contains only green pigments, is illuminated by a laser l...

    Text Solution

    |

  5. The ratio of amplitude of magnetic field to the amplitude of electric ...

    Text Solution

    |

  6. In electromagnetic wave , according to Maxwell , changing electric fie...

    Text Solution

    |

  7. The speed of light in an isotropic medium depends on

    Text Solution

    |

  8. The energy of gamma (gamma) ray photon is E(gamma) and that of an X-ra...

    Text Solution

    |

  9. The speed of electmagnetic waves in vacuum is equal to

    Text Solution

    |

  10. A plane electromagnetic wave of frequency 20 MHz travels through a spa...

    Text Solution

    |

  11. In electromagnetic spectrum, the frequencies of gamma-rays and X-rays ...

    Text Solution

    |

  12. The electromagnetic waves detected using a thermopile and used in phys...

    Text Solution

    |

  13. The wavelength of X-rays is in the range

    Text Solution

    |

  14. The wavelength of the short radio waves, microwaves, ultraviolet waves...

    Text Solution

    |

  15. The transverse nature of electromagnetic waves is proved by which of t...

    Text Solution

    |

  16. Which component of electromagnetic spectrum have maximum wavelength?

    Text Solution

    |

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

    Text Solution

    |

  18. If c is the velocity of light in free space, the time taken by light t...

    Text Solution

    |

  19. The electric field associated with an electromagnetic wave in vacuum i...

    Text Solution

    |

  20. The wave function (in SI unit) for a light wave is given as Psi(x,t) =...

    Text Solution

    |