Gibilisco:Chapter 1 - Basic Physical Concept

20 Questions | Total Attempts: 349

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Physics Quizzes & Trivia

This is the MCQs for Gibilisco:CHAPTER 1 BASIC PHYSICAL CONCEPT


Questions and Answers
  • 1. 
    The atomic number of an element is determined by:
    • A. 

      The number of neutrons.

    • B. 

      The number of protons.

    • C. 

      The number of neutrons plus the number of protons

    • D. 

      The number of electrons.

  • 2. 
    The atomic weight of an element is approximately determined by:
    • A. 

      The number of neutrons.

    • B. 

      The number of protons.

    • C. 

      The number of neutrons plus the number of protons.

    • D. 

      The number of electrons.

  • 3. 
    The volt is the standard unit of:
    • A. 

      Current.

    • B. 

      Charge.

    • C. 

      Electromotive force.

    • D. 

      Resistance.

  • 4. 
    A coil has 500 turns and carries 75 mA of current. The magnetomotive force will be:
    • A. 

      37,500 At.

    • B. 

      . 375 At.

    • C. 

      37.5 At.

    • D. 

      3.75 At.

  • 5. 
    A ferromagnetic material:
    • A. 

      Concentrates magnetic flux lines within itself.

    • B. 

      Increases the total magnetomotive force around a current-carrying wire.

    • C. 

      Causes an increase in the current in a wire.

    • D. 

      Increases the number of ampere-turns in a wire.

  • 6. 
    Suppose there is an atom of oxygen, containing eight protons and eight neutrons in the nucleus, and two neutrons are added to the nucleus. The resulting atomic weight is about:
    • A. 

      8

    • B. 

      10

    • C. 

      16

    • D. 

      18

  • 7. 
    An isotope:
    • A. 

      Is electrically neutral.

    • B. 

      Has positive electric charge.

    • C. 

      Has negative electric charge.

    • D. 

      Might have either a positive or negative charge.

  • 8. 
    If a material has low resistance:
    • A. 

      It is a good conductor.

    • B. 

      It is a poor conductor.

    • C. 

      The current flows mainly in the form of holes.

    • D. 

      Current can flow only in one direction.

  • 9. 
    In a compound:
    • A. 

      There can be just a single atom of an element.

    • B. 

      There must always be two or more elements.

    • C. 

      The atoms are mixed in with each other but not joined.

    • D. 

      There is always a shortage of electrons.

  • 10. 
    A molecule:
    • A. 

      Might consist of just a single atom of an element.

    • B. 

      Must always contain two or more elements.

    • C. 

      Always has two or more atoms.

    • D. 

      Is always electrically charged.

  • 11. 
    An electrical insulator can be made a conductor:
    • A. 

      By heating.

    • B. 

      By cooling.

    • C. 

      By ionizing.

    • D. 

      By oxidizing.

  • 12. 
    A stroke of lightning:
    • A. 

      Is caused by a movement of holes in an insulator.

    • B. 

      Has a very low current.

    • C. 

      Is a discharge of static electricity.

    • D. 

      Builds up between clouds.

  • 13. 
    Of the following substances, the worst conductor is:
    • A. 

      Air.

    • B. 

      Copper.

    • C. 

      Iron.

    • D. 

      Salt water.

  • 14. 
    A backwards-working electric motor is best described as:
    • A. 

      An inefficient, energy-wasting device.

    • B. 

      A motor with the voltage connected the wrong way.

    • C. 

      An electric generator.

    • D. 

      A magnetic-field generator.

  • 15. 
    If an EMF of one volt is placed across a resistance of two ohms, then the current is:
    • A. 

      Half an ampere.

    • B. 

      One ampere.

    • C. 

      Two amperes.

    • D. 

      One ohm.

  • 16. 
    In some batteries, chemical energy can be replenished by:
    • A. 

      Connecting it to a light bulb.

    • B. 

      Charging it.

    • C. 

      Discharging it.

    • D. 

      No means known; when a battery is dead, you have to throw it away.

  • 17. 
    An ion:
    • A. 

      Is electrically neutral.

    • B. 

      Has positive electric charge.

    • C. 

      Has negative electric charge.

    • D. 

      Might have either a positive or negative charge.

  • 18. 
    Movement of holes in a semiconductor:
    • A. 

      Is like a flow of electrons in the same direction.

    • B. 

      Is possible only if the current is high enough.

    • C. 

      Results in a certain amount of electric current.

    • D. 

      Causes the material to stop conducting.

  • 19. 
    Of the following substances, the best conductor is:
    • A. 

      Air.

    • B. 

      Copper.

    • C. 

      Iron.

    • D. 

      Salt water.

  • 20. 
    A coulomb:
    • A. 

      Represents a current of one ampere.

    • B. 

      Flows through a 100-watt light bulb.

    • C. 

      Is one ampere per second.

    • D. 

      Is an extremely large number of charge carriers.

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