Virtual Labs

If Ec is the enery corresponding to conduction band and Ev is the energy corresponding to valence band. What is the fermi level of an Intrinsic semiconductor?

a: Ec Explanation

Explanation

b: Ec-Ev Explanation

Explanation

c: Ec Explanation

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d: (Ec+Ev)/2 Explanation

Explanation

What is the effect of dopants in an n-type semiconductor?

a: Increases the number of holes in the valence band Explanation

Explanation

b: Increases the number of electrons in the conduction band Explanation

Explanation

c: Decreases the conductivity of the semiconductor Explanation

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d: Moves the Fermi level closer to the valence band Explanation

Explanation

Given that f0(E)=0.8 and T=300 K, What is the Fermi level Ef relative to the energy level E=0.2 eV?

a: 0.1 eV Explanation

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b: 0.5 eV Explanation

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c: 0.3 eV Explanation

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d: 0.7 eV Explanation

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Extrinsic Semiconductors conduct electricity because?

a: Atoms have very few valence electrons Explanation

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b: The valence band of the atoms is almost completely filled Explanation

Explanation

c: The valence band of the atoms is partially filled Explanation

Explanation

d: Both A and C Explanation

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