Home
Class 11
PHYSICS
Why is it hotter at the same distance ov...

Why is it hotter at the same distance over the top of a fire than in front of it?

Text Solution

Verified by Experts

At a point in front of fire, heat is received due to the process of radiation only, while at a point above the fire, heat reaches both due to radiation and convection. Hence the result.
Promotional Banner

Topper's Solved these Questions

  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise Advanced problems for competitions|21 Videos
  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise NCERT Questions|73 Videos
  • PROPERTIES OF BULK MATTER

    PRADEEP|Exercise Solved Examples|159 Videos
  • PHYSICAL WORLD AND MEASUREMENT

    PRADEEP|Exercise Competiton Focus Jee Medical Entrance|18 Videos
  • RAY OPTICS

    PRADEEP|Exercise Problem For Practice(a)|25 Videos

Similar Questions

Explore conceptually related problems

Why it is more hotter for same distance over the top of a candle than it in the side of its flame

Assertion It is hotter over the top of a fire than at the same distance on the sides . Reason In the upwared direction , the heat propagate through convection.

Assertion : It is hotter over the top of a fire than at the same distacne of the side. Reason : Air surrounding the fire conducts more heat upward

The rear wheel on a clown's bicycle has twice the radius of the front wheel. (a) When the bicycle is moving, is the linear speed at the very top of the rear wheel greater than, less than, or the same as that of the very top of the front wheel? (b) Is the angular speed of the rear wheel greater than, less than, or the same as that of the front wheel?

Why it is cooler at the top of a mountain than at sea level?

A vertical rod is partially submerged in an aquarium. You look at the aquarium from some distance. Does the underwater part of the rod appear to be closer than, farther than or the same distance as the top of the rod.

A train of length L move with a constant speed V_(t) . A person at the back of the train fires a bullet at time t = 0 towards a target which is at a distance of D ( at time t = 0 ) from the front of the train ( on the same direction of motion ). Another person at the front of the train fires another bullet at time t = T towards the same target. Both bullets reach the target at the same time. Assuming the speed of the bullets V_(b) are same, the length of the train is

Why a liquid boils at a lower tempetature at the top of a mountain than at sea level ?

PRADEEP-PROPERTIES OF BULK MATTER-Conceptual Problems
  1. Why water is preferred to any other liquid in the hot water bottles?

    Text Solution

    |

  2. At the triple point of water wheater the relative amounts of ice, wate...

    Text Solution

    |

  3. What happens if water vapour at a pressure of 0.003 atmosphere is cool...

    Text Solution

    |

  4. The ice at 0^(@)C is converted into steam at 100^(@)C . State the isot...

    Text Solution

    |

  5. Why do electrons in insulators not contribute to its conductivity?

    Text Solution

    |

  6. As air is a bad conductor of heat, whu do we not feel warm without clo...

    Text Solution

    |

  7. Why is it hotter at the same distance over the top of a fire than in f...

    Text Solution

    |

  8. On a hot day, a car is left in sunlight with all the windows closed. A...

    Text Solution

    |

  9. Why felt is used for thermal insulation in preference to air?

    Text Solution

    |

  10. Two rods A and B are of equal length. Each rod has the ends at temp T(...

    Text Solution

    |

  11. Three rods made of same material and having the same cross-section hav...

    Text Solution

    |

  12. The temperature of the two outer surfaces of a composite slab, consist...

    Text Solution

    |

  13. If a drop of water falls on a very hot iron, it does not evaporates fo...

    Text Solution

    |

  14. We cannot boil water inside the earth's satellite. Explain.

    Text Solution

    |

  15. A sphere of radius r, density,rho and specific heat s is heated to tem...

    Text Solution

    |

  16. The earth constantly receives heat radiation from the sun and gets war...

    Text Solution

    |

  17. Is it necessary that all black coloured objects should be considered b...

    Text Solution

    |

  18. when a piece of red glass heated in a furnace is taken out, it glows w...

    Text Solution

    |

  19. White clothes are more comfortable in summer while coloured clothes ar...

    Text Solution

    |

  20. Animals curl into a ball, when they feel very cold.

    Text Solution

    |