Home
Class 12
PHYSICS
The specific resistance of a wire is rho...

The specific resistance of a wire is `rho`, it's volume is `3m^3` and its resistance is 3 ohm, then it's length will be:

A

`1/sqrtrho`

B

`3/sqrtrho`

C

`rhosqrt3`

D

`rhosqrt(1/3)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • COMMUNICATION SYSTEM

    MBD PUBLICATION|Exercise QUESTION BANK|174 Videos

  • DISPERSION OF LIGHT

    MBD PUBLICATION|Exercise QUESTION BANK|111 Videos

Similar Questions

Explore conceptually related problems

The resistance of a wire is 2Omega . If its is stretched to double its length then its resistance will be _______ (fill in the gap)

The resistance of certain length of wire is R Ohm . It is doubled on itself so that its length is l/2. Its resistance becomes.

A wire of resistance 10Omega is stretech to thrice its original length. The resistance of the wire will be

MBD PUBLICATION-CURRENT ELECTRICITY-QUESTION BANK
  1. The electric intensity ( E ), current density (J) and specific resista...

    Text Solution

    |

  2. A material B has twice the specific resistance of 'A'. A circular wire...

    Text Solution

    |

  3. The specific resistance of a wire is rho, it's volume is 3m^3 and its ...

    Text Solution

    |

  4. Two wires that are made up of different materials have their specific ...

    Text Solution

    |

  5. The electric field (E),current density (J) and conductivity (sigma) of...

    Text Solution

    |

  6. A wire when connected to 220V mains supply has power dissipation P1 . ...

    Text Solution

    |

  7. A bulb of 220V and 300 W is connected across 110v circuit .The percent...

    Text Solution

    |

  8. The power of a heater is 750 W at 1000^@C.What will be it's power at ...

    Text Solution

    |

  9. Number of colour band marked on carbon resistors is :

    Text Solution

    |

  10. The color code for a resistor of resistance 3.5 K Omega with 5% tolera...

    Text Solution

    |

  11. The colour sequence in a carbon resistor is red, brown, orange and sil...

    Text Solution

    |

  12. A wire of resistance R is cut into 'n' equal parts. These parts are th...

    Text Solution

    |

  13. There are n similar conductors each of resistance R. The resultant res...

    Text Solution

    |

  14. In the net work of resistors shown in the adjoining figure, the equiva...

    Text Solution

    |

  15. The potential difference between points A and B of adjoining figure is...

    Text Solution

    |

  16. The current in the adjoining circuit will be:

    Text Solution

    |

  17. Resistance of tungsten wire at 150^@C is 133Omegha.Its resistance temp...

    Text Solution

    |

  18. The temperature co.efficient of resistance for a wire is 0.00125^@C.At...

    Text Solution

    |

  19. The resistance of a conductor is 5 ohm at 50^@C and 6 ohm at 100^@C .I...

    Text Solution

    |

  20. A cell of emf R is connected with an external resistance R and P.D. ac...

    Text Solution

    |