Home
Class 11
PHYSICS
A body of length l m having cross-sectio...

A body of length l m having cross-sectional area `0.75 m^2` conducts heat `6000 J s^-1`. Then find the temperature difference if K=200 J m^-1 K^-1`.

A

`20^@C`

B

`40^@C`

C

`80^@C`

D

`100^@C`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Sound

    TARGET PUBLICATION|Exercise Exercise|248 Videos

Similar Questions

Explore conceptually related problems

A brass wire of length 4.5 m, with cross-section area of 3 xx 10^-5 m^2 and a copper wire of length 5.0 m with cross section area 4 xx 10^5 m^2 are stretched by the same load. The same elongation is produced in both the wires. Find the ratio of Young's Modulus of brass and copper.

Water is filled in a cylindrical container to a height of 3m . The ratio of the cross-sectional area of the orifice and the beaker is 0.1 . The square of the speed of the liquid coming out from the orifice is (g=10m//s^(2)) .

A brass wire of length 4.5m with cross-section area of 3xx10^(-5) m^2 and a copper wire of length 5.0 m with cross section area 4xx10^(-5) m^2 are stretched by the same load. The same elongation is produced in both the wires. Find the ratio of Young’s modulus of brass and copper.

Consider a uniformly wound solenoid having N turns and length L. The core of the solenoid is air. Find the inductance of the solenoid of N = 200, L = 20 cm and cross-sectional area, A = 5 cm^2 . Calculate the induced emf e_L , if the current flowing through the solenoid decreases at a rate of 60 A//s .

A metal cube has each side of length 1 m losses all its energy at a rate of 3000 watt. If the emissity is 0.4, Find its temperature (Given:a= 5.767xx10^-8J//m^2sk^-1 )

A body moves along a circle of radius 1 m with a constant kinetic energy 25 J. Then force acting on it is

A cylindrical tank having cross-sectional area A is filled with water to a height of 2.0 m. A circular hole of corss-section area is opened at a height of 75 cm from the bottom. If a//A=sqrt(0.2, then velocity with which waer emerges from the hole is (g =9.8 ms^(-2))

A metal wire of length L_1 and area of cross-section A is attached to a rigid support. Another metal wire of length L_2 and of the same cross-sectional area is attached to free end of the first wire. A body of mass M is then suspended from the free end of the second wire. If Y_1 and Y_2 are the Young's moduli of the wires respectively, the effective force constant of the system of two wire is

A metal wire of length 2.5 m and area of cross section 1.5 xx 10^-6 m^2 is stretched through 2 mm. Calculate the work done during stretching. (Y= 1.25xx 10^11 Nm^-2 ).

TARGET PUBLICATION-Thermal Properties of Matter-Exercise
  1. Two identical blocks of ice move in opposite directions with equal spe...

    Text Solution

    |

  2. A 15kW drilling machine is used to drill a bore in a small aluminium b...

    Text Solution

    |

  3. When a body has the same temperature as that of its surroundings

    Text Solution

    |

  4. A body takes 8 min to cool from 60^@ C to 50^@C. If the temperature of...

    Text Solution

    |

  5. How much steam at 100^@C will just melt 1600 g of ice at -8^@C? (Spec...

    Text Solution

    |

  6. Assertion: A brass disc is just fitted in a hole in steel plate. The s...

    Text Solution

    |

  7. The coefficient of thermal conductivity of copper is nine times that o...

    Text Solution

    |

  8. Two beakers A and B are filled to the brim with water a 4^@C. When A i...

    Text Solution

    |

  9. The length of a wire is lA when the tension in it is TA and of another...

    Text Solution

    |

  10. A flask of volume 4000 cc is completely filled with mercury at 0^@C. T...

    Text Solution

    |

  11. A balloon contains 600 m^3 of helium a 37^@C and atmospheric pressure....

    Text Solution

    |

  12. The two on pieces A and B appear red and yellow respectively when plac...

    Text Solution

    |

  13. Expansion during heating

    Text Solution

    |

  14. What is the temperature of the triple-point of water on an absolute sc...

    Text Solution

    |

  15. Newton's law of cooling is used in laboratory for the determination of...

    Text Solution

    |

  16. A body of length l m having cross-sectional area 0.75 m^2 conducts hea...

    Text Solution

    |

  17. Pressure at the triple point of water is

    Text Solution

    |

  18. For a certain gas the ratio of specific heats is 3/2. What is the valu...

    Text Solution

    |

  19. When a metal rod is heated it expands because

    Text Solution

    |

  20. A hot ball of iron weighing 200 g is dropped into 500 g of water at 10...

    Text Solution

    |