ELECTRICITY FOR TRADES
3rd Edition
ISBN: 9780078118630
Author: Petruzella
Publisher: RENT MCG
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Textbook Question
Chapter 7.2, Problem 3RQ
Calculate the unknown value for each circuit (a) through (l) listed in the following table.
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2. Refer to slide 3-11 as the reference, given X(s) =
(i) X(z).
(ii) zero-pole locations of X(z)
(iii) X*(s)
s+4
determine
(s+2)(s-2).
Can you check if the answer is correct?
The regulator in the following figure is to produce a nominal output voltage, Vo = 18.6 V
and a maximum load current / ✓ (max) = 1 A. It is known that, the Zener diode current Iz
shall not drop to less than 15 mA, the current /₁ = 1 mA and the input voltage V, may
vary between 22 V to 30 V. Determine the values of R1, R2 and R3.
(3 marks)
Х
R3
Iz
V₁ +
Vz
Dz
+
A
BE
VIL
I₁
+
ŹR₁
R₂
RL V.
-
Chapter 7 Solutions
ELECTRICITY FOR TRADES
Ch. 7.1 - What is the base unit and symbol used for...Ch. 7.1 - Write the metric prefix and symbol used to...Ch. 7.1 - Convert each of the following: a. 2,500 to...Ch. 7.2 - State Ohms law.Ch. 7.2 - List the three formulas associated with Ohms law.Ch. 7.2 - Calculate the unknown value for each circuit (a)...Ch. 7.2 - A pilot lamp with 12 volts applied to it draws a...Ch. 7.2 - A resistor has a resistance of 220 . The current...Ch. 7.2 - An electric soldering iron with a 40- heating...Ch. 7.2 - A baseboard heater draws a current of 8 A when...
Ch. 7.2 - A sensor module has an internal resistance of...Ch. 7.2 - The current through and the voltage drop across a...Ch. 7.2 - The heating element for an electric floor heating...Ch. 7.2 - How much power is lost in the form of heat when 25...Ch. 7.2 - The voltage drop across a 330- resistor is...Ch. 7.2 - A digital multimeter display indicates a reading...Ch. 7.2 - Calculate the unknown value for each circuit (a)...Ch. 7.2 - Assume that applying 120 volts to a resistive load...Ch. 7.2 - The voltage drop across a 10-W, 330- resistor is...Ch. 7.2 - The cold resistance of a tungsten lamp filament is...Ch. 7.2 - An electric baseboard heater is rated for 1200 W...Ch. 7.2 - A lamp dimmer switch is rated for 5 A at 120 V....Ch. 7.2 - A 400-W 4- public address speaker is to be fused...
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