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

Practice Test
      
  1.A voltmeter should be connected to a circuit in __________.  
  a.   parallel  
  b.   series  
  c.   series-parallel  
  d.   short form  
  Hint    
      
  2.A 340- resistor and a 550- reisistor are connected in parallel. This group is then connected in series with a 180- and a 120- resistor. What is the equivalent resistance of the circuit?  
  a.   420  
  b.   210  
  c.   550  
  d.   510  
  Hint    
      
  3.Why must an ammeter have an extremely low resistance?  
  a.   High resistance reduces risk of fire.  
  b.   High resistance changes the voltage reading.  
  c.   High resistance ensures there are fewer ohms.  
  d.   High resistance will change the current in the circuit you want to measure.  
  Hint    
      
  4.What happens when an electric switch is turned off?  
  a.   The circuit becomes a series circuit.  
  b.   The circuit is broken.  
  c.   A circuit breaker turns off.  
  d.   There is a short circuit.  
  Hint    
      
  5.Why does running too many appliances on one circuit cause a fuse to blow or a circuit breaker to shut off?  
  a.   The current drops to almost zero.  
  b.   As more resistors are added in parallel, the total resistance decreases, which causes an increase in the total amount of current.  
  c.   As more resistors are added in parallel, the total resistance decreases, which causes an increase in the total amount of voltage.  
  d.   The voltage becomes too much for the circuit to handle.  
  Hint    
      
  6.The __________ is the sum of all resistances in a series.  
  a.   equivalent resistance  
  b.   resistance total  
  c.   resistance  
  d.   calculated resistance  
  Hint    
      
  7.What happens to lights in a series if one goes out?  
  a.   every other one goes out  
  b.   they flicker  
  c.   they stay lit  
  d.   they all go out  
  Hint    
      
  8.How does a ground-fault interrupter work?  
  a.   It detects small differences in resistance and opens the circuit.  
  b.   It detects small differences in current caused by an extra current path and opens the circuit.  
  c.   It detects small differences in temperatures and opens the circuit.  
  d.   It detects small differences in voltage caused by an extra voltage path and opens the circuit.  
  Hint    
      
  9.The equivalent resistance of resistors in parallel can be calculated by __________.  
  a.   R = RA + RB + RC  
  b.   1/R = 1/RA + 1/RB + 1/RC  
  c.   1/R = 1/RA x 1/RB x 1/RC  
  d.   R = 1/RA + 1/RB + 1/RC  
  Hint    
      
  10.A 1.5 V battery is attached to a 1.0- resistor and a 2.0- resistor in series. What is the current?  
  a.   0.50 A  
  b.   4.5 A  
  c.   2.0 A  
  d.   3.0 A  
  Hint    

 
   
McGraw-Hill / Glencoe
The McGraw-Hill Companies