A galvanometer has a coil with a resistance of 24.0 . A current ...

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A galvanometer has a coil with a resistance of 24.0 . A current of 180 A causes full-scale deflection. If the galvanometer is to be used to construct an ammeter that deflects full scale for 10.0 A, what shunt resistor is required?
 
  A)
 
  123  
  B)
 
  234  
  C)
 
  342  
  D)
 
  432  
  E)
 
  423

Question 2

An analog ammeter able to have a 0.5 A maximum reading is to be built using a small coil of resistance R = 20 , and full scale deflection at 1 mA. What resistance should be added to this coil and how should it be connected to the coil?
 
  A)
 
  0.08  in parallel
  B)
 
  0.5  in parallel
  C)
 
  0.02  in series
  D)
 
  20.4  in parallel
  E)
 
  0.04  in parallel

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Answer to Question 1

D

Answer to Question 2

E

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