Electric Forces And Electric Fields (15)

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 Electric Forces And Electric Fields (15)
Chapter 15 Physics - Multiple Choice

  
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  • 1. 
    A very small ball has a mass of 5.0e-3 Kg and a charge of 4 uC. What magnitude electric field directed upward will balance the weight of the ball?
    • A. 

      1.2e4 N/C

    • B. 

      8.2e2 N/C

    • C. 

      2.0e-2 N/C

    • D. 

      5.1e6 N/C

    • E. 

      3.7e3 N/C


  • 2. 
    Estimate the magnitude of electric field strenght due to the proton of hydrogen atom at a distance of 5.39e-11m. The expected position of the electron in the atom.
    • A. 

      10^-11 n/c

    • B. 

      10^8 n/c

    • C. 

      10^14 n/c

    • D. 

      10^6 n/c

    • E. 

      10^12 n/c


  • 3. 
    The magnitude of the electric force between two protons is 2.3e-26 N. how far apart are they?
    • A. 

      0.10m

    • B. 

      0.022m

    • C. 

      3.1m

    • D. 

      0.0057m

    • E. 

      0.48m


  • 4. 

      
    • A. 

      1.0 N/C

    • B. 

      -1.0 N/C

    • C. 

      0

    • D. 

      0.25 N/C

    • E. 

      It varies


  • 5. 

    • A. 

      0

    • B. 

      -560

    • C. 

      -340

    • D. 

      260

    • E. 

      170


  • 6. 

    • A. 

      2.56 cm

    • B. 

      5.12 cm

    • C. 

      11.2 cm

    • D. 

      3.34 m

    • E. 

      4.24 m


  • 7. 

    • A. 

      1.15

    • B. 

      -2.24

    • C. 

      3.91

    • D. 

      -1.15

    • E. 

      0.863


  • 8. 

    • A. 

      F/12

    • B. 

      F/3

    • C. 

      F/6

    • D. 

      3F/4

    • E. 

      3F/2


  • 9. 

    • A. 

      Near a long uniformly charge wire

    • B. 

      Above a large uniformly charged plane

    • C. 

      Inside a uniformly charged ball

    • D. 

      Outside a uniformy charged sphere

    • E. 

      Gauss law can be readily applied to find the electric field in all contexts


  • 10. 

    • A. 

      Repel

    • B. 

      Attract

    • C. 

      Attract or repel

    • D. 

      Exert no electrostatic force

    • E. 

      Charge insulator always spontaneously discharges


  • 11. 

    • A. 

      The density matter is too great

    • B. 

      The positive nuclei of your body repel the positive nuclei of the atoms of the ground

    • C. 

      The density of the ground is greater than the density of your body

    • D. 

      Atoms are bound together by chemical bonds

    • E. 

      Electrons on the ground's surface of your feet repel one another


  • 12. 

    • A. 

      Upward and to the right

    • B. 

      To the right

    • C. 

      Downward

    • D. 

      Downward and to the left

    • E. 

      Field is zero at that point


  • 13. 

    • A. 

      It becomes larger

    • B. 

      It becomes smaller

    • C. 

      It stays the same

    • D. 

      It changes unpredictably

    • E. 

      It is zero


  • 14. 

    • A. 

      Increase masurably

    • B. 

      Increase by an amount to small to measure directly

    • C. 

      Stay unchanged

    • D. 

      Decrease by an amount to small to measure directly

    • E. 

      Decrease masurably


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