Pre Test Physics Science Club

15 Questions | Total Attempts: 182

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Pre Test Physics Science Club

Questions and Answers
  • 1. 
    The diagram shows a thick-walled tube. The thickness of the wall is 2 mm. What is the internal diameter d of the tube?
    • A. 

      2.8 cm

    • B. 

      3.2 cm

    • C. 

      3.4 cm

    • D. 

      7.4 cm

  • 2. 
    The mass and density of four objects are given in the table.Which object has the largest volume?
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 3. 
    A container is filled with water of density 1000 kg/m-3 to a height of 0.2 m. The base of the container is accidentaly broken and water leaks out from a tiny hole of area 2.0 x 10-6 m2 . to prevent water from leaking out, a sticky tape is adhered over the tiny hole. (take g= 10 N/kg) What is the minimum force the tape must be able to withstand?
    • A. 

      0.002 N

    • B. 

      0.004 N

    • C. 

      2000 N

    • D. 

      4000 N

  • 4. 
    When a resultant force of 6.0 N is applied to mass of 3.0 kg, the acceleration of the mass will be
    • A. 

      0.5 m s-2

    • B. 

      2.0 m s-2

    • C. 

      3.0m s-2

    • D. 

      18.0m s-2

  • 5. 
    A cumin canister of mass m: 5.0 kg slides across a horizontal frictionless counter with speed v= 0.40 m/s. It then runs into and compresses a spring of spring constant k = 500 N/m. distance d is the spring compressed?
    • A. 

      2 cm

    • B. 

      4 cm

    • C. 

      6 cm

    • D. 

      8 cm

  • 6. 
    A brick of mass 0.8 kg is accidentally dropped from a high scaffolding. It reaches the ground whit a kinetic energy 240 J. How high is the scaffolding ?
    • A. 

      19 m

    • B. 

      300 m

    • C. 

      192 m

    • D. 

      30 m

  • 7. 
    A machine is able to lift 200 kg of bricks vertically up to a height of 30 m above the ground in 50 s. What is the power of the machine ?
    • A. 

      0.12 kW

    • B. 

      1.2 kW

    • C. 

      6.0 kW

    • D. 

      300 kW

  • 8. 
    An electric kettle of power 800 W raises the temperature of 1 kg of water by 200C in three minutes. How much energy is wasted ? (Specific heat capacity of water, 4200 J kg-10C-1 )
    • A. 

      2400 J

    • B. 

      4200 J

    • C. 

      60000J

    • D. 

      120000 J

  • 9. 
    The diagram shows a wave. How many wavelengths are there between X and Y?
    • A. 

      3/2

    • B. 

      1

    • C. 

      1/2

    • D. 

      3

  • 10. 
    Music is produced by the loudspeaker of a radio. Which property of the sound wave increases when the music is made louder?
    • A. 

      Amplitude

    • B. 

      Frequency

    • C. 

      Speed

    • D. 

      Wavelength

  • 11. 
    A sonic ‘tape measure’ is used to measure the length of a room. It measures a time interval of0.060 s between transmitting a sound pulse and receiving the echo. The speed of sound in air is330 m / s.How far is the reflecting wall from the ‘tape measure’?
    • A. 

      5.5 m

    • B. 

      9.9 m

    • C. 

      11 m

    • D. 

      20 m

  • 12. 
    A concave mirror of focal length 20.0 cm produces an image (virtual) whose hight is two times that of the object.  The characteristics of image are ....
    • A. 

      Image distance -20.0 cm, upright

    • B. 

      Image distance -20.0 cm, inverted

    • C. 

      Image distance 60.0 cm, upright

    • D. 

      Image distance 60.0 cm, inverted

  • 13. 
    A plastic rod is rubbed with a dry cloth and becomes positively charged. Why has the rod become positively charged?
    • A. 

      It has gained electrons.

    • B. 

      It has gained neutrons.

    • C. 

      It has lost electrons.

    • D. 

      It has lost neutrons.

  • 14. 
    Why is electrical energy usually transmitted at high voltage?
    • A. 

      As little energy as possible is wasted in the transmission cables.

    • B. 

      The current in the transmission cables is as large as possible.

    • C. 

      The resistance of the transmission cables is as small as possible.

    • D. 

      The transmission system does not require transformers.

  • 15. 
    A light bulb is marked 12 V, 6 W. When lit by a 12 V battery, what is the current?
    • A. 

      0.5 A

    • B. 

      2 A

    • C. 

      6 A

    • D. 

      12 A12 A

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