Science Home Product Information Site Map Search Contact Us   Glencoe Online
Quizzes Quiz
 
Chapter 23: Series and Parallel Circuits

Practice Test
      
  1.What happens to lights in a series if one goes out?  
  a.   they stay lit  
  b.   they all go out  
  c.   every other one goes out  
  d.   they flicker  
  Hint    
      
  2.A voltmeter should be connected to a circuit in __________.  
  a.   short form  
  b.   series-parallel  
  c.   parallel  
  d.   series  
  Hint    
      
  3.Two 240.0- resistors are connected in parallel and placed across a 12.0-V battery. What is the current in each branch of the circuit?  
  a.   0.0500 A  
  b.   0.100 A  
  c.   0.0250 A  
  d.   0.0125 A  
  Hint    
      
  4.A 45- and a 65- resistor are connected in series. These resistors are then connected in parallel with a 120- resistor. What is the equivalent resistance for the circuit?  
  a.   230  
  b.   150  
  c.   57  
  d.   22  
  Hint    
      
  5.If you have a 90 V power source with a 30- and 60- resistor in series, what is the voltage drop over the 60- resistor?  
  a.   60 V  
  b.   2 V  
  c.   90 V  
  d.   30 V  
  Hint    
      
  6.Why does running too many appliances on one circuit cause a fuse to blow or a circuit breaker to shut off?  
  a.   As more resistors are added in parallel, the total resistance decreases, which causes an increase in the total amount of current.  
  b.   As more resistors are added in parallel, the total resistance decreases, which causes an increase in the total amount of voltage.  
  c.   The voltage becomes too much for the circuit to handle.  
  d.   The current drops to almost zero.  
  Hint    
      
  7.How does a ground-fault interrupter work?  
  a.   It detects small differences in resistance and opens the circuit.  
  b.   It detects small differences in temperatures and opens the circuit.  
  c.   It detects small differences in voltage caused by an extra voltage path and opens the circuit.  
  d.   It detects small differences in current caused by an extra current path and opens the circuit.  
  Hint    
      
  8.Five lights of equal resistance connected in series will __________.  
  a.   never light up  
  b.   flicker  
  c.   be equally bright  
  d.   be brighter the closer they get to the positive end  
  Hint    
      
  9.The __________ is the sum of all resistances in a series.  
  a.   equivalent resistance  
  b.   resistance total  
  c.   calculated resistance  
  d.   resistance  
  Hint    
      
  10.In the river model for an electric circuit, the amount of water flowing through the river each second is the __________.  
  a.   current  
  b.   path  
  c.   voltage  
  d.   power  
  Hint    

 
   
McGraw-Hill / Glencoe
The McGraw-Hill Companies