Consider an LRC circuit that is driven by an AC applied voltage. ...

[sheilaspns]

Consider an LRC circuit that is driven by an AC applied voltage. At resonance,
 
  A)
 
  the peak voltage across the resistor is equal to the peak voltage across the inductor.
  B)
 
  the peak voltage across the resistor is equal to the peak voltage across the capacitor.
  C)
 
  the peak voltage across the capacitor is greater than the peak voltage across the inductor.
  D)
 
  the current is in phase with the driving voltage.
  E)
 
  the peak voltage across the inductor is greater than the peak voltage across the capacitor.

Question 2

Four waves are described by the following expressions, where distances are measured in meters and times in seconds.
 
  I y = 0.12 cos(3x - 21t)
   II y = 0.15 sin(6x + 42t)
   III y = 0.13 cos(6x + 21t)
   IV y = -0.23 sin(3x - 42t)
  Which of these waves travel in the +x direction?
  A)
 
  I and II
 
  B)
 
  I and III
 
  C)
 
  II and IV
 
  D)
 
  I and IV
 
  E)
 
  II and III

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Answer to Question 1

D

Answer to Question 2

D

[sheilaspns]

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