Home
Class 12
PHYSICS
A metallic wire of resistane of 40Omega ...

A metallic wire of resistane of `40Omega` is stretched to twice its length. Its new resistance would be approximately.

A

20 ohm

B

80 ohm

C

120 ohm

D

160 ohm

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • TEXTUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|507 Videos

  • STRUCTURE OF NUCLEUS

    MODERN PUBLICATION|Exercise EXERCISE|47 Videos

  • TEXUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|195 Videos

Similar Questions

Explore conceptually related problems

A wire of resistance 1 Omega is stretched to double its length. What is the new resistance?

A wire of resistances 1 Omega is streched to double its length. What is the new resiatnce?

A wire of resistivity rho is stretched to double its length. Then its new resistivity will:

A wire of resistivity rho is streched to double its length. Then its new resistivity will:

A 8 ohm resistance wire is stretched to double its length. Calculate the new resistance of the wire.

If a wire is stretched to make it 0.1% longer, its resistance of will

MODERN PUBLICATION-TEXTUAL QUESTIONS-EXERCISE
  1. The specific resistance ofo a wire 1.1 m long, 0.4 mm in diameter and ...

    Text Solution

    |

  2. Two copper wires, one of length 1 m and the other of length 9 m, are f...

    Text Solution

    |

  3. A metallic wire of resistane of 40Omega is stretched to twice its leng...

    Text Solution

    |

  4. When a piece of aluminium wire of finite length is drawn through a ser...

    Text Solution

    |

  5. A certain piece of copper is to be shaped into a wire of minimum resis...

    Text Solution

    |

  6. A uniform wire of resistance R is uniformly compressed along it s leng...

    Text Solution

    |

  7. The appropriate material to be used in the construction of resistance ...

    Text Solution

    |

  8. Why are alloys used for making standard resistance coils?

    Text Solution

    |

  9. If the resistivity of an alloy is rho' and that of constituent metals ...

    Text Solution

    |

  10. Carbon resistor used in electronic circuit are marked for their resist...

    Text Solution

    |

  11. When a current flows in a conductor, the order of magnitude of drift v...

    Text Solution

    |

  12. The ratio of drift velocity to that of the thermal velocity of an elec...

    Text Solution

    |

  13. Assume that each atom in a copper wire contributes one free electron. ...

    Text Solution

    |

  14. Resistance of a conductor increases with the rise of temperature, beca...

    Text Solution

    |

  15. A piece of germanium and another of copper are stated to experience a ...

    Text Solution

    |

  16. The resistance of a conductor of a conductor is 5Omega at 50^@C, and ...

    Text Solution

    |

  17. Kilowatt is the unit of :

    Text Solution

    |

  18. Watt-hour meter measures

    Text Solution

    |

  19. In an ordinary electric heater, if the length of the coil is reduced t...

    Text Solution

    |

  20. A 500 W heating unit is designed to operate from a 115 V line. If the ...

    Text Solution

    |