In semiconductors, the forbidden energy gap between valence band and conduction band is of the order of :

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Answer 1

In semiconductors at room temperature, some of the electrons acquire enough energy to jump to conduction level. Thus, to obtain large number of electrons in conduction band, some energy has to be supplied to the electrons present in the valance band. This energy must be equal to the difference between conduction band and valance band. For semiconductors, it is of the order of $1 e V$ .

Answer 2

In semiconductors at room temperature, some of the electrons acquire enough energy to jump to conduction level. Thus, to obtain large number of electrons in conduction band, some energy has to be supplied to the electrons present in the valance band. This energy must be equal to the difference between conduction band and valance band. For semiconductors, it is of the order of

1 e V

.

In semiconductors, the forbidden energy gap between valence band and conduction band is of the order of :

$1 e V$

$5 e V$

$1 k e V$

$1 M e V$

The free electron density is more in .....

In n-type semiconductors, the electron concentration is equal to :

A silicon piece and a silver piece are connected in series and a potential difference is applied between their free ends. The potential difference applied on them are $V_{1}$ and $V_{2}$ respectively. They are then cooled to $200 K$ . Now :

The level formed due to impurity atom,in the forbidden energy gap,very near to the valence band in a p-type semiconductor is called

On increasing temperature, the conductivity of pure semiconductors

Revise with Concepts

Metals, Conductors and semiconductors

Electron Energies in Solids

In semiconductors, the forbidden energy gap between valence band and conduction band is of the order of :

1 eV

5 eV

1 keV

1 MeV

The free electron density is more in .....

In n-type semiconductors, the electron concentration is equal to :

A silicon piece and a silver piece are connected in series and a potential difference is applied between their free ends. The potential difference applied on them are V1​ and V2​ respectively. They are then cooled to 200K. Now :

The level formed due to impurity atom,in the forbidden energy gap,very near to the valence band in a p-type semiconductor is called

On increasing temperature, the conductivity of pure semiconductors

Revise with Concepts

Metals, Conductors and semiconductors

Electron Energies in Solids

$1 e V$

$5 e V$

$1 k e V$

$1 M e V$

A silicon piece and a silver piece are connected in series and a potential difference is applied between their free ends. The potential difference applied on them are $V_{1}$ and $V_{2}$ respectively. They are then cooled to $200 K$ . Now :