Section 22.1 Current and Circuits

Practice Test
      
  1.If the the current in the circuit of Figure 22-5 is 1.5 A, what is the total resistance of the circuit?  
  a.   18 Ω  
  b.   4 Ω  
  c.   8 Ω  
  d.   16 Ω  
  Hint    
      
  2.If the ammeter in Figure 22-3 were moved to the left of the light bulb, what would it read?  
  a.   0 A  
  b.   1 A  
  c.   4 A  
  d.   2 A  
  Hint    
      
  3.In Figure 22-3, if the battery voltage were changed to 9 V, what would the ammeter reading be?  
  a.   2 A  
  b.   1 A  
  c.   3 A  
  d.   4 A  
  Hint    
      
  4.For the circuit arrangement shown in Figure 22-4, if the battery voltage is 9.0 V and the ammeter reads 0.60 A, what is the resistance?  
  a.   5.4 Ω  
  b.   0.06 Ω  
  c.   15 Ω  
  d.   30 Ω  
  Hint    
      
  5.If the resistance of the lightbulb in Figure 22-3 were changed to 6 Ω, what would tha ammeter read?  
  a.   2 A  
  b.   6 A  
  c.   4 A  
  d.   8 A  
  Hint    
      
  6.If the combined resistance of the potentiometer and motor in Figure 22-5 is 250 Ω, what is the current through the circuit?  
  a.   21 A  
  b.   48 mA  
  c.   3000 A  
  d.   120 A  
  Hint    

 
   
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