Home
Class 11
PHYSICS
A) Heat transfer by conduction & convect...

A) Heat transfer by conduction & convection require a material medium
B) Heat transfer by radiation does not affect the medium through which it passes

A

A is true, B is false

B

A is false, B is True

C

Both A & B are false

D

Both A & B are True

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • THERMAL PROPERTIES OF MATTER

    AAKASH SERIES|Exercise EXERCISE-IB|68 Videos

  • THERMAL PROPERTIES OF MATTER

    AAKASH SERIES|Exercise EXERCISE-2|106 Videos

  • THERMAL PROPERTIES OF MATTER

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (LEVEL - II) PRACTICE SHEET (ADVANCED) Integer/Subjective Type Questions|2 Videos

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTION

    AAKASH SERIES|Exercise PRACTICE EXERCISE|99 Videos

  • THERMODYNAMICS

    AAKASH SERIES|Exercise EXERCISE - 3|33 Videos

Similar Questions

Explore conceptually related problems

With the propagation of a longitudinal wave through a material medium, the quantities transferred in the direction of propagation are

Statement A convection involves flow of matter within a fluid due to unequal temperatures of its parts. Statements B A hot bar placed under a running tap water loses heat due to effect of convection with in water. Statement C Heat transfer always involves temperature different between two systems. Identify the correct option.

The material which does not allow electric current to pass through it is known as.

Chemical reactions are invariably assocated with the transfer of energy either in the form of heat or light. In the laboratory, heat changes in physical and chemical processes are measured with an instrument called calorimeter. Heat change in the process is calculated as: q= ms DeltaT , s= specific heat = c Delta T , c= heat capacity Heat of reaction at constant volume is measured using bomb calorimeter. qv= Delta U= internal energy change. Heat of reaction at constant pressure is measured using simple or water calorimeter. q_(p) = Delta H, q_(p) = q_(v) + P Delta V, DeltaH = DeltaU + Delta nRT The amount of energy released during a chemical change depnds on the physical state of reactants and products, the condition of pressure, temperature and volume at which the reaction is carried out. The variation of heat of reaction with temperature and pressure is given by Kirchhoff's equation: (DeltaH_(2)- DeltaH_(1))/(TT_(2)-T_(1)) = DeltaC_(P) (At constant pressure), (DeltaU_(2)- DeltaU_(1))/(TT_(2)-T_(1)) = DeltaC_(V) (At constant volume) The heat capacity of bomb calorimeter (with its contents) is 500J/K. When 0.1g of CH_(4) was burnt in this calorimeter the temperature rose by 2^(@)C . The value of DeltaU per mole will be

For transmission of heat from one place to the otther, medium is required in

AAKASH SERIES-THERMAL PROPERTIES OF MATTER-EXERCISE-IA
  1. The gas constant for a molecule is (terms have usual meaning) a) K ...

    Text Solution

    |

  2. The units of universal gas constant is a) Jmol^(-1)K^(-1) b) Jkg^(...

    Text Solution

    |

  3. A) Generally solids are better conductors than liquids B) Liquids ar...

    Text Solution

    |

  4. Water is taken in a metal container and is heated at its bottom. The a...

    Text Solution

    |

  5. For a good cooking vessel, the necessary characterstics are a) Large...

    Text Solution

    |

  6. A) Heat transfer by conduction & convection require a material medium ...

    Text Solution

    |

  7. A) A body of low Thermal capacity gets heated or cooled quickly B) G...

    Text Solution

    |

  8. Two identical conductors made of metals of coefficients of thermal con...

    Text Solution

    |

  9. A) A hot hollow sphere in vacuum cools by convection B) A hot solid ...

    Text Solution

    |

  10. A) Natural convection can take place in gravity free region B) Force...

    Text Solution

    |

  11. In a common room heating system, Statement (A): Hot water is circula...

    Text Solution

    |

  12. A) Polished surface is a poor absorber but good reflector B) Rough ...

    Text Solution

    |

  13. A spherical black body is of radius 'r'. Its radiating power is 'P' an...

    Text Solution

    |

  14. Statement (A) : Water can be boiled in a thin paper box without even c...

    Text Solution

    |

  15. A piece of charcoal and a piece of shining steel of the same area are ...

    Text Solution

    |

  16. A glass full of hot milk is poured on the table. It begins to cool gra...

    Text Solution

    |

  17. A glass full of hot milk is poured on the table. It begins to cool gra...

    Text Solution

    |

  18. In Newton's law of cooling, if the rates of emission of radiation by a...

    Text Solution

    |

  19. In which one of the following cases does the thermal conductivity incr...

    Text Solution

    |

  20. The thermal conductivites of copper, mercury and glass are respectivel...

    Text Solution

    |