Home
Class 12
PHYSICS
A piece of iron is heated in a flame. It...

A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and finally turns to white hot. The correct explanation for the above observation is possible by using.

A

Stefan's law

B

Wien's displacement law

C

Kirchhoff's law

D

Newton's law of cooling

Text Solution

Verified by Experts

The correct Answer is:
c
Promotional Banner

Topper's Solved these Questions

  • GRAVITATION

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise Gravitation|50 Videos

  • LAWS OF MOTION

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise Physics|60 Videos

Similar Questions

Explore conceptually related problems

A piece of iron is heated till it becomes red-hot. It then becomes soft and is beaten to a desired shape. What kind of changes are observed in this process– reversible or irreversible?

A black platinum wire, when heated, first appears dull red, then yellow, then blue and finally white. Explain.

Four pieces of iron are heated to different are respectively red, yellow orange and white respectively The one that is heated to the highest temperature will exhibit the colour .

NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-HEAT AND THERMODYNAMICS-PHYSICS
  1. The mean free path of molecules of a gas (radius r) is inversely propo...

    Text Solution

    |

  2. The molar specific heats of an ideal gas at constant pressure and volu...

    Text Solution

    |

  3. A piece of iron is heated in a flame. It first becomes dull red then b...

    Text Solution

    |

  4. A gas is taken through the cycle A rarrB rarr C rarr A, as shown in fi...

    Text Solution

    |

  5. During an adiabatic process, the pressure of gas is found to be propor...

    Text Solution

    |

  6. In the given (V-T) diagram, what is the relation between pressure P(1)...

    Text Solution

    |

  7. The amount of heat energy required to raise the temperature of 1 g of ...

    Text Solution

    |

  8. A thermodynamic system is taken through the cycle ABCD as shown in the...

    Text Solution

    |

  9. If the radius of a star is R and it acts as a black body, what would b...

    Text Solution

    |

  10. One mole of an ideal gas goes from an initial state A to final state B...

    Text Solution

    |

  11. Liquid oxygen at 50 K is heated to 300 K at constant pressure of 1 atm...

    Text Solution

    |

  12. When 1 kg of ice at 0^(@)C melts to water at 0^(@)C, the resulting cha...

    Text Solution

    |

  13. During an isothermal expansion, a confined ideal gas does -150 J of wo...

    Text Solution

    |

  14. If DeltaU and Delta W represent the increase in internal energy and wo...

    Text Solution

    |

  15. A cylindrical metallic rod in thermal contact with two reservation of ...

    Text Solution

    |

  16. A black body at 227^(@)C radiates heat at the rate of 7 cal cm^(-2) s...

    Text Solution

    |

  17. In thermodynamic processes which of the following statement is not tru...

    Text Solution

    |

  18. The two ends of a rod of length L and a uniform cross-sectional area A...

    Text Solution

    |

  19. The internal energy change in a system that has absorbed 2 kcal of hea...

    Text Solution

    |

  20. At 10^(@)C, the value of the density of a fixed mass of an ideal gas d...

    Text Solution

    |