Home
Class 12
PHYSICS
The condition under which a microwave o...

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

A

The frequency of the microwaves has no relation with natural frequency of water molecules.

B

Microwaves are heat waves, so always produce heating

C

Infra-red waves produce heating in a microwave oven

D

The frequency of the microwaves must match the resonant frequency of the water molecules

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC WAVES

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION - D Assertion-Reason Type Questions|25 Videos

  • ELECTROMAGNETIC WAVES

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION - B Objective Type Questions|10 Videos

  • ELECTROMAGNETIC INDUCTION

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT(SECTION -D) Assertion-Reason type Question)|15 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION - D|9 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.

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 ).

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//kg.K and B = 2xx 10^-2 cal//kg.K^2 . 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 ).

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//kg.K and B = 2xx 10^-2 cal//kg.K^2 . 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 ).

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//kg.K and B = 2xx 10^-2 cal//kg.K^2 . 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 ).

AAKASH INSTITUTE ENGLISH-ELECTROMAGNETIC WAVES-ASSIGNMENT SECTION - C Previous Years Questions
  1. Out of the following options which one one can be used to produce a p...

    Text Solution

    |

  2. The energy of the EM waves is of the order of 15keV. To which of the s...

    Text Solution

    |

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

    Text Solution

    |

  4. Light with an energy flux of 25xx10^(4)Wm^(-2)falls on a perfectly ref...

    Text Solution

    |

  5. The condition under which a microwave oven heats up a food item conta...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  8. The electric and the magnetic field, associated with an electromagneti...

    Text Solution

    |

  9. The decreasing order of wavelength of infrared, microwave, ultraviolet...

    Text Solution

    |

  10. Which of the following statement is false for the properties of electr...

    Text Solution

    |

  11. The electric field of an electromagnetic wave in free space is given b...

    Text Solution

    |

  12. The electric field part of an electromagnetic wave in a medium is repr...

    Text Solution

    |

  13. The velocity of electromagnetic radiation in a medium of permittivity ...

    Text Solution

    |

  14. The electric and magnetic field of an electromagnetic wave are:-

    Text Solution

    |

  15. If lambda(v) , lambda(x) and lambda(m) represent the wavelength of v...

    Text Solution

    |

  16. The velocity of electromagnetic radiation in a medium of permittivity ...

    Text Solution

    |

  17. Which of the following electromagnetic waves has smallest wavelength?

    Text Solution

    |

  18. If epsilon(0) and mu(0) are, respectively, the electric permittivity a...

    Text Solution

    |

  19. Greenhouse Effect

    Text Solution

    |

  20. The velocity of electromagnetic wave is along the direction of

    Text Solution

    |