Quiz 3 For Unit Exam

16 Questions | Total Attempts: 83

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Electrical Quizzes & Trivia

Electrical Circuits


Questions and Answers
  • 1. 
    A flow of electrons from one atom to another is called
    • A. 

      Voltage

    • B. 

      Current

    • C. 

      Charge

    • D. 

      Inductance

  • 2. 
    The unit of measure used to express the difference in the number of charges at two physically different points in a circuit is the:
    • A. 

      Volt

    • B. 

      Coulomb

    • C. 

      Ampere

    • D. 

      Siemens

  • 3. 
    The minimum amount of  current that could potentially kill a human is usally suggested to be:
    • A. 

      1 mA

    • B. 

      15 mA

    • C. 

      500 mA

    • D. 

      1 A

  • 4. 
    Which of the following is NOT a form of Ohm's Law?
    • A. 

      I=VR

    • B. 

      R=V/I

    • C. 

      V=IR

    • D. 

      I=V/R

  • 5. 
    The milliampere has a value that is:
    • A. 

      One million times larger than a microampere

    • B. 

      One thousand times larger than an ampere

    • C. 

      One millionth of an ampere

    • D. 

      One thousandth of an ampere

  • 6. 
    In any electrical circuit, an increase in current flow is created when:
    • A. 

      The source voltage is decreased

    • B. 

      The resistance is increased

    • C. 

      The resistance is decreased

    • D. 

      Either C or D above

  • 7. 
    What is the quantity of heat, in watts given off when a 5 ohm resistor has 10 volts applied to its terminals?
    • A. 

      20

    • B. 

      50

    • C. 

      250

    • D. 

      500

  • 8. 
    A series ciruit has a current flow of 50 mA and its resistance is 100 ohms.  The source voltage is:
    • A. 

      5 V

    • B. 

      20 V

    • C. 

      500 V

    • D. 

      2 V

  • 9. 
     When a EMF of 2KV is applied to a 0.15 M ohm resistance, the current flow will be about:
    • A. 

      830 mA

    • B. 

      133 mA

    • C. 

      83 mA

    • D. 

      13 mA

  • 10. 
    An electrical appliance has 300 ohms of resistance.  What is its current flow when connected to a 120 V source
    • A. 

      25 mA

    • B. 

      25 A

    • C. 

      400 mA

    • D. 

      None of the above

  • 11. 
    The rule for voltage drops in series circuit is:
    • A. 

      The sum of the voltage drops equals the applied voltage

    • B. 

      All voltage drops are equal

    • C. 

      The smallest resistance has the largest voltage drop.

    • D. 

      The voltage drop across the largest resistance equals the applied V.

  • 12. 
    A series circuit consists of 7 lamps of equal value. When one lamp filament fails (burns out) and is "open" the rest:
    • A. 

      Will stay lit

    • B. 

      Will not stay lit

    • C. 

      Will also fail and be "open"

    • D. 

      None of these

  • 13. 
    If the applied voltage is increased in a series circuit:
    • A. 

      The total resistance will decrease and current will stay the same

    • B. 

      Current and resistance will both increase

    • C. 

      Current will increase and the resistance will stay the same

    • D. 

      Current and resistance will both decrease

  • 14. 
    With two equal resistances in series across a 90 volt battery, the voltage across each resistor equals:
    • A. 

      30 Volts

    • B. 

      45 Volts

    • C. 

      90 Volts

    • D. 

      180 Volts

    • E. 

      It is impossible to determine the voltages unless the resistor values are known.

  • 15. 
    An ammeter should always be connected
    • A. 

      Across the load

    • B. 

      In series with ground

    • C. 

      In series with the part of the circuit under test

    • D. 

      In parallel with the power source

  • 16. 
    An ideal voltmeter would have
    • A. 

      A very low resistance

    • B. 

      A very high resistance

    • C. 

      Zero resistance

    • D. 

      A passion pink carrying case that matches your shoes

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