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In a semiconductor,...

In a semiconductor,

A

There are no free electrons at room temperature

B

The number of free electron is more than that in a conductor

C

There are no free electrons at `0K`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
At `0K` semiconductor behaves as an insulator.
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Knowledge Check

  • The temperature coefficient of resistance of a semiconductor

    A
    Is always positive
    B
    Is always negative
    C
    Is zero
    D
    May be positive or negative or zero

  • After doping, resistivity of a semiconductor

    A
    does not alter
    B
    increases
    C
    decreases
    D
    may increase or decrease depending on the dopant

  • ________ is a semiconductor.

    A
    Ga
    B
    Pb
    C
    Ge
    D
    Sn
    • A2Z-SEMICONDUCTOR ELECTRONICS-EXERCISE
    1. In a semiconductor,

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    2. A peice of copper and the other of germanium are cooled from the room ...

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    3. Energy band in solids are a consequence of

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    4. When forward bias is applied to a P-N junction, then what happence to ...

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    5. When npn transistor is used as an amplifler

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    6. For a transistor ampliflier in common emiter configuration for load im...

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    7. If a full wave reactifier circuit is operating from 50 Hz mains, the f...

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

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    9. To obtain a P-type Si semiconductor, we need to dope pure Si with

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    10. Two PN-junction can be connected in series by three different methods ...

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    11. In a p- n junction diode not connected to any circuit,

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    12. Which of the following statements is not true?

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    13. The dominant mechanisms for motion of charge carriers in forward and r...

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    14. For a given plate voltage , the plate current in a triode valve is max...

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    15. The probbility of electrons to be found in the conduction band of an i...

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    16. The typical ionisation energy of a donor in silicon is

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    17. In the circuit given below, V(t) is the sinusoidal voltage source, vol...

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    18. The circuit shown in following figure contanis two diode D(1) and D(2)...

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    19. The following configuration of gate is equivalent to

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    20. The output of a NAND gate is 0

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