2A672 Code 6 Volume 1 UREs Complete

88 Questions | Total Attempts: 259

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2A672 Quizzes & Trivia

Code 6 UREs volume 1 is a quiz testing your knowledge on different concepts in Physics. The topics tested vary from atomic structure, energy just to mention but a few. Take it up and see how good you are.


Questions and Answers
  • 1. 
    What is the simplest form of matter?
    • A. 

      Element

    • B. 

      Mixture

    • C. 

      Electrons

    • D. 

      Compound

  • 2. 
    In an atom, what electrons contain the most energy?
    • A. 

      The energy is shared equal by all electrons

    • B. 

      Orbiting electrons

    • C. 

      Valance electrons

    • D. 

      K shell electrons

  • 3. 
    If there are 8 electrons in the outer most shell of an atom, then it is considered
    • A. 

      Complete

    • B. 

      Unstable

    • C. 

      Charged

    • D. 

      Stable

  • 4. 
    Atoms having more than four electrons, but less than eight are known as
    • A. 

      Insulators

    • B. 

      Conductors

    • C. 

      Stable atoms

    • D. 

      Semiconductors

  • 5. 
    The electrostatic fields around a positive ion move
    • A. 

      Inward

    • B. 

      Outward

    • C. 

      Inward, then outward

    • D. 

      Outward, then inward

  • 6. 
    The force required to move free electrons through a conductor is known as
    • A. 

      Current

    • B. 

      Voltage

    • C. 

      Negative charge

    • D. 

      Electrostatic force

  • 7. 
    What are factors that affect the resistance of a material?
    • A. 

      Area, weight, and state of material

    • B. 

      Area, temperature, and type of material

    • C. 

      Temperature, weight and state of material

    • D. 

      Temperature, type of material, and state of material

  • 8. 
    What is the resistance in a circuit if the power rating is 40 watts and total current is 2 amps?
    • A. 

      40 ohms

    • B. 

      20 ohms

    • C. 

      10 ohms

    • D. 

      0.5 ohms

  • 9. 
    in a series-parallel circuit, find RT if series resistor R1= 7 ohms, and parallel resistors R2 and R3= 8 ohms.
    • A. 

      23 ohms

    • B. 

      15 ohms

    • C. 

      11 ohms

    • D. 

      8 ohms

  • 10. 
    In a series-parallel circuit, the series current at I1=9 amps; in the two parallel branches, I2= 5amps; and thevalue of I3 is not listed.  Use Ohm's law to find the value of I3 and IT.
    • A. 

      I3= 4amps and IT= 14 amps

    • B. 

      I3=4 amps and IT=9amps

    • C. 

      I3=4 amps and IT=18 amps

    • D. 

      Not enough information to solve

  • 11. 
    In a series-parallel circuit, total voltage is 12 volts, the value of E1 in the series portion of the circuit is unknown.  There are two parallel branches (E2=3volts) and the value of E3 in the second parallel branch is unknown.  Using Ohm's law, find the value of E1 and E3.
    • A. 

      E3= 9 volts and E1= 12 volts

    • B. 

      E3= 9 volts and E1 = 3 volts

    • C. 

      E3= 3 volts and E1= 6 volts

    • D. 

      E3= 3 volts and E1= 9 volts

  • 12. 
    What is the difference between an open and a short?
    • A. 

      An open causes resistance to decrease; a short causes resistance to increase

    • B. 

      Excessive current flow in an open circuit; no current flow in a shorted component

    • C. 

      No current flow in an open circuit; excessive current flow in a shorted component

    • D. 

      Minimum voltage development across the open component; maximum voltage development across the shorted component

  • 13. 
    When voltage is induced into a conductor by a relative motion between the conductor and a magnetic field this principle is known as
    • A. 

      Magnetism

    • B. 

      Reluctance

    • C. 

      Direct current

    • D. 

      Electromagnetic induction

  • 14. 
    In an inductive circuit, what is meant by current lags voltage by 90 degrees?
    • A. 

      Current is zero when voltage is zero; voltage is maximum when current is maximum

    • B. 

      Current is maximum when voltage is zero; voltage is maximum when current is zero

    • C. 

      If current decreases, voltage aids in the decrease

    • D. 

      If current increases, voltage aids the increase

  • 15. 
    What is the basic principle of operation of transformers?
    • A. 

      Mutual induction

    • B. 

      Magnetic induction

    • C. 

      Counterelectromotive force

    • D. 

      Primary and secondary induction

  • 16. 
    What transformer winding acts as a conductor and provides the path into which voltage is induced?
    • A. 

      Field

    • B. 

      Primary

    • C. 

      Secondary

    • D. 

      Stationary

  • 17. 
    If the size of the plates of a capacitor is increased, how is capacitance affected?
    • A. 

      Capacitance increases

    • B. 

      Capacitance decreases

    • C. 

      Electrons distorted and scattered

    • D. 

      Electrostatic force between the plates decreases

  • 18. 
    What statement best describes a capacitive circuit?
    • A. 

      Current leads voltage by 90 degrees

    • B. 

      Applied voltage leads current by 90 degrees

    • C. 

      Has the ability to conduct in one direction and not the other

    • D. 

      Has the ability to conduct in all directions when gated or discharged

  • 19. 
    In what type of circuit(s) does a capacitor oppose any change in voltage
    • A. 

      Alternating current (AC) and direct current (DC)

    • B. 

      Pulsating DC

    • C. 

      Pure DC

    • D. 

      AC

  • 20. 
    What statement best describes a diode
    • A. 

      Is a five-terminal device

    • B. 

      Is a three-terminal device

    • C. 

      Has the ability to conduct in one direction and not the other

    • D. 

      Has the ability to conduct in all directions when gated or discharged

  • 21. 
    What are the minority carriers in P-type material?
    • A. 

      Holes

    • B. 

      Protons

    • C. 

      Neutrons

    • D. 

      Electrons

  • 22. 
    The area of a semiconductor where P-type material is joined to N-type material is known as
    • A. 

      Dielectric region

    • B. 

      Depletion region

    • C. 

      Depletion field

    • D. 

      PN region

  • 23. 
    A junction diode has how many PN junction(s)?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

  • 24. 
    If a negative potential is connected to the cathode and a positive potential is connected to the anode of a PN junction, the diode is
    • A. 

      Not allowing current to flow

    • B. 

      Forward biased

    • C. 

      Reverse biased

    • D. 

      Turned on

  • 25. 
    In a circuit using a bridge rectifier, how many diodes are forward biased during the first cycle of alternating cuurent (AC)?
    • A. 

      4

    • B. 

      3

    • C. 

      2

    • D. 

      1

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