Electrical Engineering: Concepts and Applications 1th. Edition by S.A. Reza Zekavat | 9780132539180 | 0132539187

Basic Electrical

Electrical Engineering: Concepts and Applications

344 SOLVED PROBLEMS

Question: B.3

Laplace Transform Find the Laplace transform of: x(t) = 5 + e^-2t ...

Verified Answer:

From the previous examples,(B.1, B.2) it is known ...

Question: 12.8

Magnetic Circuit Given the current i = 5 A, and μr = 2000, find the mmf, the total reluctance, Φ, B, and H for the magnetic circuit in Figure 12.11. ...

Verified Answer:

Using Equation (12.11a), the mmf corresponds to: [...

Question: C.7

Application of Euler’s Identity Calculate e^1-j1. ...

Verified Answer:

Method 1: Angle in radians:

e^{1-j 1}=e^1 \...

Question: C.6

Complex Operations Assume Z1 = 3∠45°, Z2 = 4∠45°, calculate Z1 + Z2, Z1Z2, and Z1/Z2. ...

Verified Answer:

First, convert

Z_1

and

Z_2[/...

Question: C.5

Multiplicaton and Division in Polar Form Assume Z1 = 2.828∠45° and Z2 = 3∠30°, calculate Z1Z2 and Z1/Z2. ...

Verified Answer:

\begin{aligned}Z_1 \times Z_2 &=(2.828 ...

Question: C.4

Polar to Exponential and Rectangular Form Conversion Convert the complex number Z1 = 10∠60° from polar form to exponential and rectangular forms. ...

Verified Answer:

The exponential form for

Z_1=10 \angle 60^{...

Question: C.3

Exponential to Rectangular and Polar Form Conversion Convert the complex number Z1 = 2.828e^j45° from exponential form to rectangular form and polar forms. ...

Verified Answer:

The polar form for

Z_1=2.828 e^{j 45^{\circ...

Question: C.2

Rectangular Form to Exponential and Polar Form Conversion Convert the complex number Z1 = 4 + j3 from rectangular form to exponential and polar forms. ...

Verified Answer:

Using Equation (C.1):

\begin{aligned}&\...

Question: B.6

Solving Differnetial Equations Using Laplace Transform Find the solution of the second-order differential equation, assuming all initial conditions are zeros: x″(t) + 5x′(t) + 6x(t) – 50 = 0 ...

Verified Answer:

Applying Laplace transform:

s^2 X(s)-s x(0)...

Question: B.2

Laplace Transform Find the Laplace transform for the decaying exponential function defined by: x(t) = { e^-at t ≥ 0 0 else ...

Verified Answer:

\begin{aligned}X(s) &=\int_0^{\infty} x...