Fundamentals of Electric Circuits 4th. Edition by Charles K. Alexander, Matthew N.O. Sadiku | 9780073529554 | 0073529559

Electric Circuits

Fundamentals of Electric Circuits

2 SOLVED PROBLEMS

324 SOLVED PROBLEMS

Question: 13.7

An ideal transformer is rated at 2400/120 V, 9.6 kVA, and has 50 turns on the secondary side. Calculate: (a) the turns ratio, (b) the number of turns on the primary side, and (c) the current ratings for the primary and secondary windings. ...

Verified Answer:

(a) This is a step-down transformer, since

...

Question: 3.1

Calculate the node voltages in the circuit shown in Fig. 3.3(a). ...

Verified Answer:

Consider Fig. 3.3 (b), where the circuit in Fig. 3...

Question: 19.10

Find [z] and [g] of a two-port network if [T] = [ 10 1.5Ω 2 S 4] ...

Verified Answer:

If A = 10 , B = 1.5 , C = 2 , D = 4 , the determi...

Question: 17.1

Determine the Fourier series of the waveform shown in Fig. 17.1. Obtain the amplitude and phase spectra. ...

Verified Answer:

The Fourier series is given by Eq. (17.3), namely,...

Question: E.3

Use MATLAB to solve for the mesh currents in the circuit in Fig. E.6. ...

Verified Answer:

For the four meshes,

- 6 + 9I_{1} - 4 ...

Question: E.4

In the circuit of Fig. E.8, let v = 4 cos(5t – 30°) and i = 0.8 cos 5t A Find v1 and v2. ...

Verified Answer:

As usual, we convert the circuit in the time-domai...

Question: E.5

In the unbalanced three-phase system shown in Fig. E.11, find currents I1 ,I2,I3, and IBb . Let ZA = 12 + j10Ω , ZB = 10 – j8Ω , ZC = 15 + j6 Ω ...

Verified Answer:

For mesh 1,

120 \underline{/ - 120°} - 1...

Question: E.6

Use MATLAB to obtain the Bode plots of G(s) = s³/s³ + 14.8s² + 38.1 s + 2554 ...

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Question: F.1

Use the KCIDE for Circuits platform to solve Example 3.2. ...

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Opening the software, we see the screen shown in F...

Question: D.7

For the RC circuit shown in Fig. D.44, obtain the magnitude plot of the output voltage vo for frequencies from 1 Hz to 10 kHz. Let R = 1Ωk and C = 4 μF. ...

Verified Answer:

The schematic is shown in Fig. D.45. We assume tha...

Question: D.6

Find current i in the circuit in Fig. D.41. ...

Verified Answer:

Recall that

20 \sin 2t = 20 \cos (2t - 9...

Question: E.1