2. Find the current i for the elements in Fig. 15.121 using complex algebra. Ske

Question

2.

Find the current i for the elements in Fig. 15.121 using complex algebra. Sketch the waveforms for ? and i on the same set of axes.

4-

Calculate the total impedance of the circuits in Fig. 15.123. Express your answer in rectangular and polar forms, and draw the impedance diagram.

FIG. 15.123 Problem 4.

For the circuit in Fig. 15.135:

a. Determine I, VR, and VC in phasor form.

b. Calculate the total power factor, and indicate whether it is leading or lagging.

c. Calculate the average power delivered to the circuit.

d. Draw the impedance diagram.

e. Draw the phasor diagram of the voltages E, VR, and VC, and the current I.

f. Find the voltages VR and VC using the voltage divider rule, and compare them with the results of part (a).

g. Draw the equivalent series circuit of the above as far as the total impedance and the current i are concerned.

FIG. 15.135 Problems 16 and 47.

*18.

Find the series element or elements that must be in the enclosed container in Fig. 15.136 to satisfy the following conditions:

Explanation / Answer

2. (a) i= 5sin(wt+10)

(b) i= j6sin(500t+10)

(c) -( j6000sin(wt) ) /pi where w= 10*pi kHz

4.(a) ZT = (6.2+ j8.2 ) ohm

(b) ZT = (12 - j6 ) ohm

(c) ZT = (6.6 + j10 ) k ohm

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