Home
Class 12
PHYSICS
Which one of the following is the correc...

Which one of the following is the correct statement ? If prieces of copper and germanjum are cooled from room temperature to liquid nitrogen temperature, then the

A

resistance of each increases

B

resistance of each decreases

C

resistance of copper decreases while that of germanium increases

D

resistance of copper increases while that of germanium decreases

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • Heat & Thermodynamics

    NDA PREVIOUS YEARS|Exercise Physics|64 Videos

Similar Questions

Explore conceptually related problems

If copper and germanium are cooled to 70 K from room temperature, then

Pieces of copper and germanium are cooled from room temperature to 80K. What will be the effect on their resistance?

A piece of copper and another of germanium are cooled from room temperature to 77 K, the resistance of -

A piece of copper and another of germanium are cooled from room temperature to 80 K. The resistance of:

A piece of copper and another of germanium are cooled from room temperature to 80 K . The resistance of

Which of the following are correct near room temperature ?

NDA PREVIOUS YEARS-ELECTRICITY & MAGNETISM -MCQ
  1. Which one of the following is the correct statement ? For an open circ...

    Text Solution

    |

  2. Which one of the following is the correct statement ? A fairly uniform...

    Text Solution

    |

  3. Which one of the following is the correct statement ? If prieces of co...

    Text Solution

    |

  4. A wire of resistance 16Omega is bent in the form of a circle. What is ...

    Text Solution

    |

  5. If an input current 3 A flows through the circuit shown above. What is...

    Text Solution

    |

  6. Which one of the following is correct? Lightning is formed, when

    Text Solution

    |

  7. Which one of the following is correct? Electrical lines of forces

    Text Solution

    |

  8. Two similar poles repel each other with a force of 0.005 N when placed...

    Text Solution

    |

  9. Which one of the following is correct? A negatively charged glass ro...

    Text Solution

    |

  10. The dimensions of a rectangular block of carbon are 2cmxx2cmxx10cm cm....

    Text Solution

    |

  11. Which one of the following is correct? One unit of electric power is...

    Text Solution

    |

  12. In our houses we get 200 VAC What does the value 220 V represent ?

    Text Solution

    |

  13. If the current is flowing through a 10 ohm resistor, then in which one...

    Text Solution

    |

  14. The rating of an electric lamp is 110V. To use it one 220V, one will h...

    Text Solution

    |

  15. A bar magnet is placed inside a uniform magnetic field, What does in e...

    Text Solution

    |

  16. The figure shows current in a part of electrical network. What is the ...

    Text Solution

    |

  17. A wire has a resistance of 32Omega. It is melted and drawn into a wire...

    Text Solution

    |

  18. In which one of the following cases Ohm's law is not vaild?

    Text Solution

    |

  19. A proton and an electron having equal velocity are allowed to pass thr...

    Text Solution

    |

  20. Consider the following : Heat produced in a conductor carrying current...

    Text Solution

    |