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  • 1/201 Questions

    An ideal voltage source has

    • Zero internal resistance
    • Infinite internal resistance
    • A load-dependent voltage
    • A load-dependent current
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  • 2. 

    A real voltage source has 

    • Zero internal resistance

    • Infinite internal resistance

    • A small internal resistance

    • A large internal resistance

    Correct Answer
    A. A small internal resistance
  • 3. 

    If a load resistance is 1 kohm, a stiff voltage source has a resistance of 

    • At least 10 ohm

    • Less than 10 ohm

    • More than 100 kohm

    • Less than 100 kohm

    Correct Answer
    A. Less than 10 ohm
  • 4. 

    An ideal current source has

    • Zero internal resistance

    • Infinite internal resistance

    • A load-dependent voltage

    • A load-dependent current

    Correct Answer
    A. Infinite internal resistance
  • 5. 

    A real current source has 

    • Zero internal resistance

    • Infinite internal resistance

    • A small internal resistance

    • A large internal resistance

    Correct Answer
    A. A large internal resistance
  • 6. 

    If a load resistance is 1 kohm, a stiff current source has a resistance of

    • At least 10 ohm

    • Less than 10 ohm

    • More than 100 kohm

    • Less than 100 kohm

    Correct Answer
    A. More than 100 kohm
  • 7. 

    The Thevenin voltage is the same as the 

    • Shorted-load voltage

    • Open-load voltage

    • Ideal source voltage

    • Norton voltage

    Correct Answer
    A. Open-load voltage
  • 8. 

    The Thevenin resistance is equal in value to the

    • Load resistance

    • Half the load resistance

    • Internal resistance of a Norton circuit

    • Open-load resistance

    Correct Answer
    A. Internal resistance of a Norton circuit
  • 9. 

    To get the Thevenin voltage, you have to 

    • Short the load resistor

    • Open the load resistor

    • Short the voltage source

    • Open the voltage source

    Correct Answer
    A. Open the load resistor
  • 10. 

    To get the Norton current, you have to

    • Short the load resistor

    • Open the load resistor

    • Short the voltage source

    • Open the current source

    Correct Answer
    A. Short the load resistor
  • 11. 

    The Norton current is sometimes called the

    • Shorted-load current

    • Open-load current

    • Thevenin current

    • Thevenin voltage

    Correct Answer
    A. Shorted-load current
  • 12. 

    A solder bridge

    • May produce a short

    • May cause an open

    • Is useful in some circuits

    • Always has high resistance

    Correct Answer
    A. May produce a short
  • 13. 

    A cold-solder joint 

    • Shows good soldering technique

    • Usually produces an open

    • Is sometimes useful

    • Always has low resistance

    Correct Answer
    A. Usually produces an open
  • 14. 

    An open resistor has

    • Infinite current through it

    • Zero voltage across it

    • Infinite voltage across it

    • Zero current through it

    Correct Answer
    A. Zero current through it
  • 15. 

    A shorted resistor has 

    • Infinite current through it

    • Zero voltage across it

    • Infinite voltage across it

    • Zero current through it

    Correct Answer
    A. Zero voltage across it
  • 16. 

    An ideal voltage source and an internal resistance is an example of the 

    • Ideal approximation

    • Second approximation

    • Higher approximation

    • Exact model

    Correct Answer
    A. Second approximation
  • 17. 

    Treating a connecting wire as a conductor with zero resistance is an example of the 

    • Ideal approximation

    • Second approximation

    • Higher approximation

    • Exact model

    Correct Answer
    A. Ideal approximation
  • 18. 

    The voltage out of an ideal voltage source 

    • Is zero

    • Is constant

    • Depends on the value of load resistance

    • Depends on the internal resistance

    Correct Answer
    A. Is constant
  • 19. 

    The current out of an ideal current source

    • Is zero

    • Is constant

    • Depends on the value of load resistance

    • Depends on the internal resistance

    Correct Answer
    A. Is constant
  • 20. 

    Thevenin’s theorem replaces a complicated circuit facing a load by an

    • Ideal voltage sourceand parallel resistor

    • Ideal current source and parallel resistor

    • Ideal voltage source and series resistor

    • Ideal current source and series resistor

    Correct Answer
    A. Ideal voltage source and series resistor
  • 21. 

    Norton’s theorem replaces a complicated circuit facing a load by an

    • Ideal voltage sourceand parallel resistor

    • Ideal current source and parallel resistor

    • Ideal voltage source and series resistor

    • Ideal current source and series resistor

    Correct Answer
    A. Ideal current source and parallel resistor
  • 22. 

    One way to short a device is 

    • With a cold-solder joint

    • With a solder bridge

    • By disconnecting it

    • By opening it

    Correct Answer
    A. With a solder bridge
  • 23. 

    Derivations are 

    • Discoveries

    • Inventions

    • Produced by mathematics

    • Always called theorems

    Correct Answer
    A. Produced by mathematics
  • 24. 

    Laws are proved by

    • Definition

    • Experiment

    • Mathematics

    • Formulas

    Correct Answer
    A. Experiment
  • 25. 

    Definitions are

    • Man made

    • Invented

    • Made up

    • All of the above

    Correct Answer
    A. All of the above
  • 26. 

    The nucleus of a copper atom contains how many protons?

    • 1

    • 4

    • 18

    • 29

    Correct Answer
    A. 29
  • 27. 

    The net charge of a neutral copper atom is

    • 0

    • +1

    • -1

    • +4

    Correct Answer
    A. 0
  • 28. 

    Assume the valence electron is removed from a copper atom. The net charge of the atom becomes 

    • 0

    • +1

    • -1

    • +4

    Correct Answer
    A. +1
  • 29. 

    The valence electron of a copper atom experiences what kind of attraction toward the nucleus? 

    • None

    • Weak

    • Strong

    • Impossible to say

    Correct Answer
    A. Weak
  • 30. 

    How many valence electrons does a silicon atom  have?

    • 0

    • 1

    • 2

    • 4

    Correct Answer
    A. 4
  • 31. 

    Which is the most widely used semiconductor?

    • Copper

    • Germanium

    • Silicon

    • None of the above

    Correct Answer
    A. Silicon
  • 32. 

    How many protons does the nucleus of a silicon atom contain?

    • 4

    • 14

    • 29

    • 32

    Correct Answer
    A. 14
  • 33. 

    Silicon atoms combine into an orderly pattern called a

    • Covalent bond

    • Crystal

    • Semiconductor

    • Valence orbit

    Correct Answer
    A. Crystal
  • 34. 

    An intrinsic semiconductor has some holes in it at room temperature. What causes these holes? 

    • Doping

    • Free electrons

    • Thermal energy

    • Valence electrons

    Correct Answer
    A. Thermal energy
  • 35. 

    Each valence electron in an intrinsic semiconductor establishes a

    • Covalent bond

    • Free electron

    • Hole

    • Recombination

    Correct Answer
    A. Covalent bond
  • 36. 

    The merging of a free electron and a hole is called 

    • Covalent bonding

    • Lifetime

    • Recommendation

    • Thermal energy

    Correct Answer
    A. Recommendation
  • 37. 

    At room temperature an intrinsic silicon crystal acts approximately like 

    • A battery

    • A conductor

    • An insulator

    • A piece of copper wire

    Correct Answer
    A. An insulator
  • 38. 

    The amount of time between the creation of a hole and its disappearance is called

    • Doping

    • Lifetime

    • Recombination

    • Valence

    Correct Answer
    A. Lifetime
  • 39. 

    The valence electron of a conductor is also called a

    • Bound electron

    • Free electron

    • Nucleus

    • Proton

    Correct Answer
    A. Free electron
  • 40. 

    A conductor has how many types of flow?

    • 1

    • 2

    • 3

    • 4

    Correct Answer
    A. 1
  • 41. 

    A semiconductor has how many types of flow? 

    • 1

    • 2

    • 3

    • 4

    Correct Answer
    A. 2
  • 42. 

    When a voltage is applied to a semiconductor, holes will flow

    • Away from the negative potential

    • Toward the positive potential

    • In the external circuit

    • None of the above

    Correct Answer
    A. None of the above
  • 43. 

    A conductor has how many holes?

    • Many

    • None

    • Only those produced by thermal energy

    • The same number as free electrons

    Correct Answer
    A. None
  • 44. 

    In an intrinsic semiconductor, the number of free electrons

    • Equals the number of holes

    • Is greater than the number of holes

    • Is less than the number of holes

    • None of the above

    Correct Answer
    A. Equals the number of holes
  • 45. 

    Absolute zero temperature equals

    • -273 degrees C

    • 0 degrees C

    • 25 degrees C

    • 50 degrees C

    Correct Answer
    A. -273 degrees C
  • 46. 

    At absolute zero temperature an intrinsic semiconductor has 

    • A few free electrons

    • Many holes

    • Many free electrons

    • No holes or free electrons

    Correct Answer
    A. No holes or free electrons
  • 47. 

    At room temperature an intrinsic semiconductor has 

    • A few free electrons and holes

    • Many holes

    • Many free electrons

    • No holes

    Correct Answer
    A. A few free electrons and holes
  • 48. 

    The number of free electrons and holes in an intrinsic semiconductor increases when the temperature

    • Decreases

    • Increases

    • Stays the same

    • None of the above

    Correct Answer
    A. Increases
  • 49. 

    The flow of valence electrons to the left means that holes are flowing to the

    • Left

    • Right

    • Either way

    • None of the above

    Correct Answer
    A. Right

Quiz Review Timeline (Updated): Mar 22, 2022 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 22, 2022
    Quiz Edited by
    ProProfs Editorial Team
  • Jul 03, 2013
    Quiz Created by
    EcE_phoenix

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