Home
Class 12
PHYSICS
A : When cooking in microwave ovens, met...

A : When cooking in microwave ovens, metal containers are used.
R : Energy of the microwaves can be easily transferred to the food through metal.

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)

C

If assertion is true statement but Reason is false, then mark (3)

D

If both Assertion and Reason are false statements, then mark (4)

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 - C Previous Years Questions|22 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

In a microwave oven, the food is kept in a plastic container and the microwave is directed towards the food. The food is cooked without melting or igniting the plastic container. Explain.

A : Food is cooked faster by microwaves than by conventional gas burner. R : Microwaves have more energy than heat waves.

In which metal container we can store salt of Sn^(2+) ?

A ticking clock sound is heard late when heard through a metal.

Which of the following metals can easily be cut with a knife?

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

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

(A) : In micro wave oven the energy is not wasted in heating up the vessel. (R) : The principle of microwave oven is to generate microwave radiation with magnetron source of appropriate freque­ncy in the work space of the oven where we keep food.

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 ?

Assertion : Ores are generally converted into oxides, prior to reduction. Reason : Metal oxides can be easily reduced.

AAKASH INSTITUTE ENGLISH-ELECTROMAGNETIC WAVES-ASSIGNMENT SECTION - D Assertion-Reason Type Questions
  1. A : Long distance radio broadcasts use short-wave bands. R : Ionosp...

    Text Solution

    |

  2. A : It is necessary to use satellites for long distance TV transmissi...

    Text Solution

    |

  3. A : Optical and radio telescopes are built on the ground but X-ray ...

    Text Solution

    |

  4. A : If the earth did not have an atmosphere, its average surface temp...

    Text Solution

    |

  5. A : It has been predicted that a global nuclear war on the earth would...

    Text Solution

    |

  6. A : In an EM wave the magnitude of the electric field vector is more ...

    Text Solution

    |

  7. A : The displacement current goes through the gap between the plates...

    Text Solution

    |

  8. As the frequency of an ac circuit increases, the current first increas...

    Text Solution

    |

  9. A : When cooking in microwave ovens, metal containers are used. R :...

    Text Solution

    |

  10. A : Food is cooked faster by microwaves than by conventional gas burne...

    Text Solution

    |

  11. A : Microwaves are commonly used in radar to locate flying objects. ...

    Text Solution

    |

  12. A : Environmental damage has depleted the ozone layer in the atmosphe...

    Text Solution

    |

  13. A: The electrical. Conductivity of the Earth's atmosphere does not cha...

    Text Solution

    |

  14. A : Static crashes are heard on a radio when a lightening flash occurs...

    Text Solution

    |

  15. A : TV signals are affected if a low flying aircraft passes by or a p...

    Text Solution

    |

  16. A : Light waves can be polarised. R : All electromagnetic waves move...

    Text Solution

    |

  17. A : In an electromagnetic wave the energy density in electric field ...

    Text Solution

    |

  18. A : The poynting vector given as bar(S) = (bar(E ) xx bar( B))/(mu0) r...

    Text Solution

    |

  19. A : The radiation pressure due to light waves is maximum when the sur...

    Text Solution

    |

  20. A : In a material medium the speed of a particle can be more than the ...

    Text Solution

    |