Virtual Labs

1. Electrons in a lattice structure are influenced by the atomic potential. How does the periodic arrangement of the atoms in semiconductor lattice affect the energy levels of electrons?

a: The energy states form continuous bands and continuum of energy bands . Explanation

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b: The energy levels remain discrete. Explanation

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c: The energy levels overlap completely. Explanation

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d: The energy levels are unaffected by the lattice. Explanation

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2. What is the maximum energy an electron can have in valence band in silicon?

a: infinite Explanation

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b: Band gap energy Explanation

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c: E_v Explanation

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d: E_c Explanation

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3. What does the square of the solution of the Schrödinger wave function signify?

a: The exact location of an electron at a given time. Explanation

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b: The probability density of finding an electron in a given region of space. Explanation

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c: The energy levels of the electron without any spatial information. Explanation

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d: The path an electron follows around the nucleus. Explanation

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4. Which of the following is false?

a: Fermi function gives the probability of a state being filled by electron Explanation

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b: Fermi function helps infer probability of a state filled by holes Explanation

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c: The value of fermi function, f(E), increases as E(energy) increases Explanation

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d: Higher the value of E, higher is it's probability of being empty. Explanation

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