DAT (Physics)

14 Questions | Total Attempts: 82

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REVIEWER IN THE DIVISION ACHIEVEMENT TEST FOR FOURTH YEAR


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Questions and Answers
  • 1. 
    If the half-life of Thorium is 24 days, the amount of a 12 gram sample remaining after 96 days is?
    • A. 

      0.75 g

    • B. 

      1.00 g

    • C. 

      1.50 g

    • D. 

      6.00 g

  • 2. 
    In what way is an alpha particle and a He atom similar? they have
    • A. 

      The same mass number but different charges.

    • B. 

      The same charge but different mass numbers.

    • C. 

      The same mass number and the same charge.

    • D. 

      Different charges and different mass numbers.

  • 3. 
    A nucleus with an excess of neutrons may decay radioactively. What will it emit?
    • A. 

      A neutron

    • B. 

      A proton

    • C. 

      An electron

    • D. 

      A positron

  • 4. 
    Which of the following is a factor preventing the use of nuclear fusion as a controlled energy source?
    • A. 

      Controlling the fusion reaction.

    • B. 

      Attaining a vary high temperature.

    • C. 

      Producing a container for high temperature gaseous ions.

    • D. 

      All of the above.

  • 5. 
    Why do objects appear visible and clear inside an open room during daytime?
    • A. 

      Because of regular reflection

    • B. 

      Because of diffused reflection

    • C. 

      Because of internal reflection

    • D. 

      Because of refraction

  • 6. 
    Why are octopus connections potential fire hazards?
    • A. 

      The total resistance becomes very high.

    • B. 

      The connection draws a higher voltage from the main supply.

    • C. 

      The current in the wires can be become very high.

    • D. 

      All of the above.

  • 7. 
    John placed newly hatched chicks in a closed bamboo pen. Which lamp is better to use inside the pen and why?
    • A. 

      A fluorescent lamp because it is cheaper to use.

    • B. 

      An incandescent lamp because it gives off more heat

    • C. 

      A fluorescent lamp because it glows brighter, thus giving off more heat.

    • D. 

      An incandescent lamp because it does not glow bright enough to disturb the chicks.

  • 8. 
    A step-down transformer is designed to work in a 12 V lamp from a 220 V supply. If the primary coil has 900 turns, what is the number of turns in the secondary coil?
    • A. 

      49

    • B. 

      50

    • C. 

      98

    • D. 

      9

  • 9. 
    Why is it advantageous to transmit electrical power to long distance at high voltage?
    • A. 

      Lower current, less heat of wire and less power loss

    • B. 

      Higher current, less heat of wire and less power loss

    • C. 

      Lower current, large heat of wire and less power loss

    • D. 

      Higher current, less heat of wire but great power loss

  • 10. 
    A brooder house can be lighted using three bulbs each having a resistance of 6.0 ohms. What is the total resistance of the bulbs when they are connected in parallel?
    • A. 

      2 ohms

    • B. 

      4 ohms

    • C. 

      18 ohms

    • D. 

      20 ohms

  • 11. 
    Which of the following metals would be attracted to a permanent magnet?
    • A. 

      Lead

    • B. 

      Copper

    • C. 

      Nickel

    • D. 

      Aluminum

  • 12. 
    The archer uses a force of 40 N to move the bowstring 0.2 meters. How much work is done by the bowstring on the arrow?
    • A. 

      8 J

    • B. 

      16 J

    • C. 

      24 J

    • D. 

      36 J

  • 13. 
    A bowling ball with a mass of 12 kg will roll at 3 m/s. Find the momentum of the bowling ball?
    • A. 

      4.0 kg.m/s

    • B. 

      15.0 kg.m/s

    • C. 

      9.0 kg.m/s

    • D. 

      36.0 kg.m/s

  • 14. 
    The following describes kinetic energy and potential energy. Which on is not a kinetic energy?A. A person runningB. New car batteryC. Flag blowing in the windD. The top of a roller coaster
    • A. 

      A and B only

    • B. 

      B and C only

    • C. 

      C and D only

    • D. 

      B and D only