Home
Class 12
PHYSICS
The temperature coefficient of resistivi...

The temperature coefficient of resistivity of material is 0.0004/k. When the temperature of the material is increased by `50^(@)C`, its resistivity increases by `2xx10^(-8)` ohm-m. The initial resistivity of the material in olm-m is 

A

`50xx10^(-8)`

B

`90xx10^(-8)`

C

`100xx10^(-8)`

D

`200xx10^(-8)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE - III|73 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE - IB|44 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise PROBLEMS (LEVEL-II)|26 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    AAKASH SERIES|Exercise PRACTICE EXERCISEX|44 Videos
AAKASH SERIES-CURRENT ELECTRICITY-EXERCISE - II
  1. The effective resistance in series combination of two equal resistance...

    Text Solution

    |

  2. A projector lamp can be used at a maximum voltage of 60V, its resistan...

    Text Solution

    |

  3. The temperature coefficient of resistivity of material is 0.0004/k. Wh...

    Text Solution

    |

  4. When two identical wires made of different materials having resistivit...

    Text Solution

    |

  5. Two metal wires of identical dimensions are connected in series. If si...

    Text Solution

    |

  6. Heat produced in a conductor of resistance 4.2Omega with 10A current i...

    Text Solution

    |

  7. A resistance coil of 60Omega is immersed in 42 kg of water. A current ...

    Text Solution

    |

  8. Two bulbs whose resistances are in the ratio of 1 : 2 are connected in...

    Text Solution

    |

  9. Which of the four resistances P,Q,R and S generate the greatest amount...

    Text Solution

    |

  10. What is the ratio of heat generated in R and 2R

    Text Solution

    |

  11. A 5^(0)C rise in the temperature is observed in a conductor by passing...

    Text Solution

    |

  12. For ensuring dissipation of same energy in all three resistors (R(1), ...

    Text Solution

    |

  13. The intemal resistance of a 2.1 V cell which gives a current of 0.2 A ...

    Text Solution

    |

  14. The emf of a daniel cell is 1.08V. When the terminals of the cell are ...

    Text Solution

    |

  15. A primary cell has an e.m.f, of 1.5 V, when short circuited it gives a...

    Text Solution

    |

  16. If the external resistance is equal to the internal resistance of a ce...

    Text Solution

    |

  17. Four cells each of emf 2V and internal resistance 1 ohm are connected ...

    Text Solution

    |

  18. A student is asked to connected four cells of e.m.f of 1 V and interna...

    Text Solution

    |

  19. 12 cells of each e.m.f 2V are connected in series among them, if 3 cel...

    Text Solution

    |

  20. Two cells of emf 1.25V, 0.75V and each of internal resistance 1 ohms a...

    Text Solution

    |