Virtual Labs

Variation of Fermi Energy Level and Carrier Concentration with Temperature

1. How does the Fermi energy level of an intrinsic semiconductor change with increasing temperature?

a: It increases Explanation

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b: It decreases Explanation

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c: It remains constant Explanation

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d: It initially increases then decreases Explanation

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2. What happens to the carrier concentration in an intrinsic semiconductor as the temperature rises?

a: It decreases Explanation

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b: It remains constant Explanation

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c: It increases Explanation

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d: It first decreases, then increases Explanation

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3. In an n-type semiconductor, what effect does increasing temperature have on the Fermi energy level?

a: It moves closer to the conduction band Explanation

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b: It moves closer to the valence band Explanation

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c: It remains unchanged Explanation

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d: It moves away from the conduction band Explanation

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4. How does the Fermi energy level of a p-type semiconductor shift with increasing temperature?

a: It moves closer to the conduction band Explanation

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b: It moves closer to the valence band Explanation

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c: It remains constant Explanation

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d: It moves away from the valence band Explanation

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5. Which factor primarily controls the variation of carrier concentration with temperature in a semiconductor?

a: Band gap energy Explanation

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b: Fermi level position Explanation

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c: Dielectric constant Explanation

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d: Magnetic field strength Explanation

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6. At very high temperatures, how does the carrier concentration in an intrinsic semiconductor behave?

a: It saturates Explanation

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b: It increases exponentially Explanation

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c: It decreases exponentially Explanation

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d: It remains constant Explanation

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7. What is the relationship between the Fermi energy level and carrier concentration in an n-type semiconductor as temperature increases?

a: Carrier concentration increases and Fermi level moves closer to conduction band Explanation

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b: Carrier concentration decreases and Fermi level moves closer to conduction band Explanation

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c: Carrier concentration remains constant and Fermi level moves away from conduction band Explanation

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d: Carrier concentration decreases and Fermi level moves closer to valence band Explanation

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8. How does the Fermi energy level in a p-type semiconductor compare to the intrinsic Fermi level at high temperatures?

a: It is closer to the valence band Explanation

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b: It is closer to the conduction band Explanation

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c: It is at the same position Explanation

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d: It moves away from both bands Explanation

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9. What is the effect of temperature on the intrinsic carrier concentration in a semiconductor?

a: It decreases linearly Explanation

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b: It increases linearly Explanation

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c: It increases exponentially Explanation

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d: It remains unchanged Explanation

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10. In a degenerate semiconductor, how does increasing temperature influence the carrier concentration?

a: It remains constant Explanation

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b: It increases significantly Explanation

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c: It decreases Explanation

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d: It decreases initially then increases Explanation

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