The de voltmeter reading is approximately 0 V and the ac vol
     The de voltmeter reading is approximately 0 V, and the ac voltmeter reading is 2 V. Cause:  C is shorted  C is open  R_1 is shorted. The dc voltmeter reading is 10 V, and the ac  voltmeter reading is 0 V.  C is shorted  C is open  R_1 is shorted  The dc voltmeter readings is 10 V, and the ac voltmeter reading is 1.8 V.  cause:  R_1 is shorted.  R_2 is open.  C is shorted.  An 8 kHz sinusoidal voltage is applied to a series RC circuit. What is the frequency of the volt-tie across the resistor? Across the capacitor? What is the waveshape of the current in the circuit of Problem 1?  Find the impedance of each circuit in Figure 10-61.   
  
  Solution
(a) given R=270ohm and Xc=100ohm
impedance Z= R-jXc = (270-j100)ohm
phase angle =tan-1(Xc/R)
= tan-1(-100/270)
= -20.32degree
(b) Given R=680ohm Xc=1Kohm=1000ohm
impedance Z=R-jXc
=(680-j1000)ohm
phase angle = tan-1(Xc/R)
= tan-1(-1000/680)
= -55.78degree

