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Tuesday, 9 October 2012

Basic electronics MCQs 2

BASIC ELECTRONICS MCQs


1. Doping of a semi conductor increases_______
    A) Resistivity
    B) Conductivity
    C) Inductance
    D) None


2. Majority carriers in n-type semiconductor are

    A) Electrons
    B) Holes
    C) both
    D) none


3. Minority carriers in n-type semiconductor are

    A) Electrons
    B) Holes
    C) both
    D) none


4. Majority carriers in P-type semiconductor are

    A) Electrons
    B) Holes
    C) Both
    D) None


5. Minority carriers in P-type semiconductor are

    A) Electrons
    B) Holes
    C) Both
    D) none


6. In which material free electron concentration is approximately equal to density of donor atoms

    A) N-type
    B) P-Type
    C) Both
    D) none


7. In intrinsic semi conductor, Fermi level(Ef) lies in the _____ of energy gap

    A) top
    B) bottom
    C) middle
    D) corner


8. Increasing the temperature of either P-type and N-type material moves the Fermi level towards the_____of the forbidden energy gap

    A) Top
    B) Bottom
    C) Corner
    D) Centre


9. ______is mostly used as a recombination agent by semiconductor manufacturers

    A) Silver
    B) Gold
    C) Iron
    D) Zinc


10. ______is used to determine whether a metal or semi conductor is of P-type or N-type

    A) Lenz's law
    B) Faraday's law
    C) Hall effect
    D) Bohr's law


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