Chapter 5

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Author:
HunniAngel
ID:
162693
Filename:
Chapter 5
Updated:
2012-07-16 14:10:00
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Diagnostic Imaging Physics
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Diagnostic Imaging Physics
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  1. What is the principal reservoir for excess electric charge?

    A) Water pipes
    B) The atmosphere
    C) The earth
    D) Lightning rod
    E) Clouds
    C) The earth
    (this multiple choice question has been scrambled)
  2. The unit of electrostatic charge is the:

    A) Ampere
    B) Newton
    C) Coulomb
    D) Volt
    E) Electron volt
    C) Coulomb
    (this multiple choice question has been scrambled)
  3. Objects become electrified because of:

    A) An excess of neutrons
    B) The transfer of neutrons
    C) An excess of protons
    D) The transfer of protons
    E) The transfer of electrons
    E) The transfer of electrons
    (this multiple choice question has been scrambled)
  4. The unit of electric potential is the:

    A) Newton
    B) Ampere
    C) Volt
    D) Ohm
    E) Coulomb
    C) Volt
    (this multiple choice question has been scrambled)
  5. Which of the following is the best electric insulator?
    A) Wood
    B) Nickel
    C) Water
    D) Aluminum
    E) Copper
    A) Wood
    (this multiple choice question has been scrambled)
  6. The electrical resistance of wire increases as the diameter of the:

    A) Insulator decreases
    B) Insulator increases
    C) Power supply increases
    D) Wire decreases
    E) Wire increases
    D) Wire decreases
    (this multiple choice question has been scrambled)
  7. The flow of 1 C/s in a conductor is equal to:

    A) 1 A
    B) 1 Ω
    C) 1 V
    D) 1 eV
    E) 1 kVp
    A) 1 A
    (this multiple choice question has been scrambled)
  8. The distinct difference between alternating current (AC) and direct current (DC) is that:

    A) DC can attain higher current
    B) DC electron flow is in one direction
    C) DC electron flow varies in amplitudeE) DC has higher electrical resistance
    D) DC can attain higher voltage
    B) DC electron flow is in one direction
    (this multiple choice question has been scrambled)
  9. The unit of electric power is the:

    A) Joule
    B) Volt
    C) Hertz
    D) Newton
    E) Watt
    E) Watt
    (this multiple choice question has been scrambled)
  10. Which of the following would likely be classified as ferromagnetic material?

    A) Lead
    B) Iron
    C) Water
    D) Air
    E) Glass
    B) Iron
    (this multiple choice question has been scrambled)
  11. If two magnets are brought together, north-to-north poles will ___________, whereas north-to-south poles will _____________.

    A) Repel; repel
    B) Repel; attract
    C) Attract; attract
    D) Attract; repel
    B) Repel; attract
    (this multiple choice question has been scrambled)
  12. When a charged particle moves in a straight line, a magnetic field is:

    A) Erased
    B) Created and has the same sign as the particle
    C) Created perpendicular to the particle motion
    D) Created along the direction of particle motion
    C) Created perpendicular to the particle motion
    (this multiple choice question has been scrambled)
  13. When iron is brought near a permanent magnet, the lines of the magnetic field are:

    A) Repelled by the magnet
    B) Attracted to the magnet
    C) Repelled by the iron
    D) Unaffected
    E) Attracted to the iron
    E) Attracted to the iron
    (this multiple choice question has been scrambled)
  14. An electron moving in a conductor:

    A) Causes the conductor to bend
    B) Causes the conductor to behave as a bar magnet
    C) Produces light in the conductor
    D) Produces a magnetic field perpendicular to the conductor
    D) Produces a magnetic field perpendicular to the conductor
    (this multiple choice question has been scrambled)
  15. The experimental link connecting electric and magnetic forces as discovered by:

    A) Oersted
    B) Faraday
    C) Lenz
    D) Edison
    A) Oersted
    (this multiple choice question has been scrambled)
  16. The fact that an electric current is induced if the conductor is in a changing magnetic field:

    A) is known as Faraday’s law
    B) is known as Ohm’s law
    C) was discovered by Lenz
    D) is the statement of the second law of electromagnetic
    A) is known as Faraday’s law
    (this multiple choice question has been scrambled)
  17. The term electromagnetic induction refers to the production of:

    A) An electric current
    B) Electromagnetic radiation
    C) An electromagnet
    D) A static charge
    E) A magnetic field
    A) An electric current
    (this multiple choice question has been scrambled)
  18. The magnetic field produced by an electromagnet has:

    A) Alternating pole
    sB) Neither a north nor a south pole
    C) Only a north pole
    D) Only a south pole
    E) Properties similar to a bar magnet
    E) Properties similar to a bar magnet
  19. When the right-hand rule is applied to a straight wire, the thumb indicates the direction of the:

    A) Electric current
    B) Electric field
    C) Electric potential
    D) Magnetic field
    E) Circuit resistance
    A) Electric current
    (this multiple choice question has been scrambled)
  20. In an electric motor:

    A) A transformer is discharged
    B) Electric current is supplied to a coil of wire
    C) A coil of wire is mechanically rotated
    D) A commutator ring is not necessary
    E) AC is changed to DC
    B) Electric current is supplied to a coil of wire
    (this multiple choice question has been scrambled)

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