Home
Class 12
PHYSICS
A piece of copper and another of germani...

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

A

copper increases and germanium

B

each of them decreases

C

each of these increases

D

copper decreases and germanium increases

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • SEMI CONDUCTOR AND LOGIC GATES

    MOTION|Exercise EXERCISE 2|33 Videos

  • ROTATIONAL MOTION

    MOTION|Exercise Exercise - 3 ( Section-B )|24 Videos

  • SIMPLE HARMONIC MOTION

    MOTION|Exercise EXERCISE -3 Section - B Previous Year Problems | JEE MAIN|23 Videos

Similar Questions

Explore conceptually related problems

Apiece of copper and another of germanium are cooler from room teperature to 77K , the resistence 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

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

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

MOTION-SEMI CONDUCTOR AND LOGIC GATES-EXERCISE 3
  1. A strip of copper and another of germanium are cooled from room tempe...

    Text Solution

    |

  2. When n-p-n transistor is used as an amplifier

    Text Solution

    |

  3. A piece of copper and another of germanium are cooled from room temper...

    Text Solution

    |

  4. The manifestation of band structure in solids is due to

    Text Solution

    |

  5. When p-n junction diode is forward biased then

    Text Solution

    |

  6. The electrical conductivity of a semiconductor increases when electrom...

    Text Solution

    |

  7. In a full wave rectifier circuit operating from 50 Hz mains frequency ...

    Text Solution

    |

  8. In a common-base amplifier, the phase difference between the input sig...

    Text Solution

    |

  9. If the ratio of the concentration of electron to that of holes in a se...

    Text Solution

    |

  10. A solid which is not transperent to visible light and whose conductivi...

    Text Solution

    |

  11. In a common base mode of transistor, collector current is 5.488 mA for...

    Text Solution

    |

  12. If the lattice constant of this semiconductor is decreased, then which...

    Text Solution

    |

  13. In the following, which one of the diodes is reverse biased ?

    Text Solution

    |

  14. The circuit has two oppositely connected ideal diodes in parallel. Wha...

    Text Solution

    |

  15. If an a p-njunction, a square input signal of 10V is applied, as shown...

    Text Solution

    |

  16. Carbon , silicon and germanium have four valence electrons each . At r...

    Text Solution

    |

  17. A working transitor with its three legs marked P, Q and R is tested us...

    Text Solution

    |

  18. In the circuit below, A and B represent two inputs and C represents th...

    Text Solution

    |

  19. A p-n junction (D) shown in the figure can act as a rectifier. An alte...

    Text Solution

    |

  20. The logic circuit shown below has the input waveforms ‘A’ and ‘B’ as s...

    Text Solution

    |