Virtual Labs

1. 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

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b: Ec-Ev Explanation

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c: Ec Explanation

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d: (Ec+Ev)/2 Explanation

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

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

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

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c: Decreases the conductivity of the semiconductor Explanation

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

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3. Given that f0(E)=0.8 and T=300 K, What could be the possible value of f(E) at T ≈ 320K?

a: 0.1 eV Explanation

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b: 0.7 eV Explanation

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c: 0.82 eV Explanation

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d: 0.9 eV Explanation

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4. Extrinsic Semiconductors conduct electricity because?

a: Ionisation energy required by carrier is higher Explanation

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b: Ionisation energies of silicon atoms change Explanation

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c: Carriers ionize easily at room temperature Explanation

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d: None Explanation

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