Home
Class 12
PHYSICS
In isulators...

In isulators

A

The valence band is partially filled with electrons

B

the conduction band is partially filled with electrons

C

the conduction band is filled with elctrons and the valence band is empty

D

the conduction band is empty and the valence band is filled with electrons

Text Solution

Verified by Experts

The correct Answer is:
D
NA
Promotional Banner

Topper's Solved these Questions

  • SEMICONDUCTORS

    CP SINGH|Exercise Exercises|140 Videos

  • REFRACTION OF LIGHT BY PLANE SURFACES

    CP SINGH|Exercise Exercises|110 Videos

  • THERMAL AND ELECTRIC EFFECT oF CURRENT

    CP SINGH|Exercise Exercises|101 Videos

Similar Questions

Explore conceptually related problems

(i) wirte two difference among conductors semiconductor and isulator on the basic of energy band diagram (ii) in a p-n juction diode what is the change in the width of the depletion layer when the diode is forward bias respectively

In an isulated container water is stirred with a rod to increase the temperature. Which of the following is true?

Assertion: A small metal ball is suspended in a uniform magnetic field with the help of an isulated thread. When a high energy X rays beam falls on the ball. Then the ball will be defected in the direction of electric field. Reason: The ball will oscillate in the field.

An isulating pipe of cross-section area A contains an electrolyte which has two types of ions: their charges being-e and + 2e . A potential difference applied between eht ends of the pipe result in the drifting of the two types of ions, having drift speed = v (- ve ion) and v//4(+ ve ion) . Both ions have the same number per unit volume = n . The current flowing through the pipe is

Two square metallic plates of 1m side are kept 0.01m apart, like a parallel plate capacitor, in air in such a way that one of their edges is perendicular, to an oil surface in a tank filled with an isulating oil. The plates are connected to a battery of e.m.f. 500 volt. The plates are then lowered vertically into the oil at a speed of 0.001 m//s . Calculate the current drawn from the battery during the process. [di-electirc constant of oil = 11, in_(0) = 8.85 xx 10^(-12) C^(2)//N^(2)m^(2)]

A slab of copper of thckness t is thrust into a parallel plate capacitor of area A and plate separation d. What is the capacitance before and after the slab is introduced? [Hint:There is no electric field inside a copper slab, or we may say that metals are isulators of epsilon_(r)=infty]

An electrometer is charged to 3 kV. Then the electrometer is touched with a neutral metal ball, mounted on an isulating rod and then the metal ball is taken away and earthed The process is done for 10 times and finally the electrometer reads 1.5 kV. After this, at least how many times must the above process be repeated in order that the electrometer reads less than 1 kV?

Suppose that the voulme of a certain ideal gas is to be doubled by one the following processes : (1) isothermal expansion (2) adiabatic expansion (3) free expansion in isulated condition (4) expansion at constant pressure . If E_(1),E_(2) ,E_(3) and E_(4) respectively are the changes in average kinetic energy of the molecules for the four processes, them :

CP SINGH-SEMICONDUCTORS-Exercises
  1. Which of the followin is correct regarding band theroy of solids?

    Text Solution

    |

  2. In isulators

    Text Solution

    |

  3. In an insulator, the forbidden energy gap between the valence band and...

    Text Solution

    |

  4. In an insulator, the forbidden energy gap between the valence band and...

    Text Solution

    |

  5. A hole in a semiconductor is

    Text Solution

    |

  6. Electric conduction in a semiconductor takes place due to

    Text Solution

    |

  7. In a semiconductor, (i)there are no free elctrons at 0K (ii) there...

    Text Solution

    |

  8. A pure semiconductor has

    Text Solution

    |

  9. when the electrical conductivity of a semiconductor is due to the brea...

    Text Solution

    |

  10. In an intrinsic semiconductor

    Text Solution

    |

  11. Let n(p) and n(e), be the numbers of holes and condution electrons in ...

    Text Solution

    |

  12. If tempreture is increased, the number of electron-hole pairs increase...

    Text Solution

    |

  13. A strip of copper and another of germanium are cooled from room tempre...

    Text Solution

    |

  14. An electric field us applied to a semiconductor.Let the number of char...

    Text Solution

    |

  15. Solids having highest energy level partially filled with electrons are

    Text Solution

    |

  16. In semiconductors at a room tempreture

    Text Solution

    |

  17. The state of the energy gained by valence electrons when the temperatu...

    Text Solution

    |

  18. Energy band in solids are a consequence of

    Text Solution

    |

  19. Which of the following is semi-conductor?

    Text Solution

    |

  20. Carbon , silicon and germanium have four valence elcectrons each . The...

    Text Solution

    |