EP ELECTRICAL ENGR.-MODIF.MASTERINGENGR
7th Edition
ISBN: 9780134486994
Author: HAMBLEY
Publisher: PEARSON CO
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Textbook Question
Chapter 7, Problem 7.1P
State three advantages of digital technology compared with analog technology.
Denotes that answers are contained in the Student Solutions files. See Appendix E for more information about accessing the Student Solutions.
Expert Solution & Answer
To determine
Advantages of digital technology compared to analog technology.
Explanation of Solution
The three advantages of digital technology over analog technology will be:
(1)Digital data is easy to store compared to analog data. Digital data is present only in the form of 0 and 1 and it is stored in a very little device, but analog data is stored in a larger device (For example, analog moviesare stored in cassettes).
(2)In digital technology, protection and privacy of data are easy but in analog technology, it is not easy to protect and have the privacy of data.
(3)In digital technology, noise in signals can be reduced by using various methods and algorithm techniques, but in analog technology, noise in signalsis reduced by only limiting the channel bandwidth.
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Find Laplace transform and the corresponding ROC for
x(t) = e−3sin(2t) u(t)dt
Three similar coils, connected in star, take a total
power of 1.5 kW, at a power factor of 0.2, from a
three-phase, 400 V, 50 Hz supply. Calculate: (a) the
resistance and inductance of each coil; (b) the line
currents if one of the coils is short-circuited.
(a) Three 20 µF capacitors are star-connected across
a 400 V, 50 Hz, three-phase, three-wire supply.
Calculate the current in each line. (b) If one of the
capacitors is short-circuited, calculate the line cur
rents. (c) If one of the capacitors is open-circuited,
calculate: the line currents and the p.d. across each
of the other two capacitors.
ANS:
1.525 A; 2.64 A, 2.64 A, 4.57 A; 1.32 A, 1.32 A, 0;
210 V
Chapter 7 Solutions
EP ELECTRICAL ENGR.-MODIF.MASTERINGENGR
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