Electric Fields

Practice Test
      
  1.An electric field is about 150 N/C downward. What is the direction of the force on a positively-charged particle?  
  a.   upward  
  b.   changes rapidly  
  c.   stationary  
  d.   downward  
  Hint    
      
  2.A 35-μF capacitor has an electric potential difference of 50.0 V across it. What is the charge on the capacitor?  
  a.   1.8×103 C  
  b.   1.4×10-6 C  
  c.   1.75×10-0 C  
  d.   1.8×10-3 C  
  Hint    
      
  3.When the electric potential difference between two positions in an electric field is zero, the positions are __________.  
  a.   close together  
  b.   polar  
  c.   at equipotential  
  d.   in equilibrium  
  Hint    
      
  4.According to Coulomb's law, the force on a test charge is __________ the test charge.  
  a.   proportional to  
  b.   less than  
  c.   equal to  
  d.   greater than  
  Hint    

 
   
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