Home
Class 9
PHYSICS
The resistance of a wire of length 31.4 ...

The resistance of a wire of length 31.4 m and diameter 1 mm is `20 Omega`. Find the resistivity of the material of the wire.

Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    NAVNEET PUBLICATION|Exercise EXERCISE|215 Videos
  • LAWS OF MOTION

    NAVNEET PUBLICATION|Exercise EXERCISE|196 Videos

Similar Questions

Explore conceptually related problems

The resistance of a wire of length 15.7 m and radius 0.5 mm is 10 Omega . Find the resistivity of the material of the wire.

Find the radius of the wire of length 25 m needed to prepare a coil of resistance 25 Omega . The resistivity of the material of the wire is 3.14 xx10^-7 Ω−m .

Calculate the length of a wire of radius 0.5 mm needed to prepare a coil of resistance 40 Omega . The resistivity of the material of the wire is 3.14 times 10^(-7) Omega-m .

Calculate the length of a wire of diameter 1 mm needed to prepare a coil of resistance 25 ohm. The resistivity of the material of the wire is 3.14 times 10^(-7) Omega.m .

Two wires have lengths in the ratio 1 : 9 and diameters in the ratio 1: 3 . The resistivities of the materials of the wires are in the ratio 4:1 . Compare their resistances.

Determine the resistance of a copper wire having a length of 1 km and diameter of 0,5 mm. (Given: rho=Resistivity of copper =1.7 times 10^(-8) Omega m )

Determine the resistance of a copper wire having, a length of 0.1 km and diameter of 0.5 mm. [Given: Resistivity of copper = 1.7 times 10^(-8) Omega m ]

A wire has length 10 m and resistance 20 Omega If the resistivity of the material of the wire is 6 times 10^(-7) Omega.m , find the area of cross section of the wire.

Two wires have lengths in the ratio 1:4 and radii in the ratio 1: 2 . The resistivities of the materials of the wires are in the ratio 5: 1 . Compare their resistances.

Determine the resistance of a copper wire having a length of 1 km and diameter of 0.5 mm

NAVNEET PUBLICATION-CURRENT ELECTRICITY-EXERCISE
  1. The resistance of a wire of length 31.4 m and diameter 1 mm is 20 Omeg...

    Text Solution

    |

  2. Fill in the blanks: The coulomb is the SI unit of………….

    Text Solution

    |

  3. Fill in the blanks: The ampere is the SI unit of………

    Text Solution

    |

  4. Fill in the blanks: The ohm is the SI unit of………..

    Text Solution

    |

  5. Fill in the blanks: The SI unit of electric potential difference is t...

    Text Solution

    |

  6. Fill in the blanks: The SI unit of electric power is the …………..

    Text Solution

    |

  7. Fill in the blanks: 1 volt=………../1 coulomb.

    Text Solution

    |

  8. Fill in the blanks: 1 ampere=………./1 second.

    Text Solution

    |

  9. Fill in the blanks: ……….=1 joule per second.

    Text Solution

    |

  10. Fill in the blanks: 1 ohm =………./1ampere.

    Text Solution

    |

  11. Fill in the blanks: 1mA=………..A.

    Text Solution

    |

  12. Fill in the blanks: Resistance =……………/electric current.

    Text Solution

    |

  13. Fill in the blanks: 1 microvolt=………volt.

    Text Solution

    |

  14. Fill in the blanks: The electrical work done when a current of 0.1 A...

    Text Solution

    |

  15. Fill in the blanks: To increase the effective resistance in a circuit...

    Text Solution

    |

  16. Fill in the blanks: The potential difference between the terminals of...

    Text Solution

    |

  17. Choose the correct alternative and write it along its allotted alphabe...

    Text Solution

    |

  18. Choose the correct alternative and write it along its allotted alphabe...

    Text Solution

    |

  19. Choose the correct alternative and write it along its allotted alphabe...

    Text Solution

    |

  20. Choose the correct alternati e and write it along its allotted alphabe...

    Text Solution

    |

  21. Choose the correct alternati e and write it along its allotted alphabe...

    Text Solution

    |