Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 18, Problem 7PP
In an R-L parallel circuit,
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1) (5 pts)For the circuit shown, find the value of Ia, Ib, I¸ and Va:
Ib
10 Ohms
+
Ic
20 Ohms
70 Volts
Va
40 Ohms
Page
1
>
of 2
-
ZOOM +
Hint: use KCL to find Ic in terms of la and lb, use KVL around the right loop to find a relationship
between la and lb, use KVL around the outer loop to solve for a current value (use ohms law for
the voltage drops across the resistors)
-
2) (5 pts) For problem 1, show that the power supplied (delivered) by the source equals the
power absorbed by the resistors.
3) (5 pts) Determine the equivalent resistance looking into terminals a-b for the two circuits
shown. Use series and parallel resistor combinations. Hint: work from the opposite end of
terminals a-b towards terminals a-b
a)
24 Ohms
10 Ohms
8 Ohms
a
REQ
b)
b =
75K
5 Ohms
50K
60 Ohms
4 OHMs
20 Ohms
30 Ohms
□ a
20K
8.2K
40K
16K
10K
□ b
7.2K
REQ
Make a LTSpice draws for the design below
A clothing store estimates that 30% of customers make a purchase. If 20 customers enter the
store in an hour, what is the probability that at least 5 of them make a purchase?
Chapter 18 Solutions
Delmar's Standard Textbook Of Electricity
Ch. 18 - 1. When an inductor and a resistor are connected...Ch. 18 - 2. An inductor and resistor are connected in...Ch. 18 - 3. What is the impedance of the circuit in...Ch. 18 - 4. What is the power factor of the circuit in...Ch. 18 - How many degrees out of phase are the current and...Ch. 18 - 6. In the circuit shown in Figure 18-1, the...Ch. 18 - 7. A resistor and an inductor are connected in...Ch. 18 - The R-L parallel circuit shown in Figure 18-1 has...Ch. 18 - The R-L parallel circuit shown in Figure 18-1 has...Ch. 18 - How many degrees out of phase are the total...
Ch. 18 - Incandescent lighting of 500 W is connected in...Ch. 18 - You are working on a residential heat pump. The...Ch. 18 - Assume that the circuit shown in Figure 18-1 is...Ch. 18 - Assume that the current flow through the resistor,...Ch. 18 - Assume that the circuit in Figure 18-1 has an...Ch. 18 - Assume that the circuit in Figure 18-1 has a power...Ch. 18 - In an R-L parallel circuit, R=240 and XL=360. Find...Ch. 18 - In an R-L parallel circuit, IT=0.25 amps, IR=0.125...Ch. 18 - In an R-L parallel circuit, ET=120 volts,...Ch. 18 - In an R-L parallel circuit, ET=48 volts, IT=0.25...Ch. 18 - In an R-L parallel circuit, ET=240 volts, R=560 R...Ch. 18 - In an R-L parallel circuit, ET=240 volts, R=560,...Ch. 18 - In an R-L parallel circuit, ET=208 volts, R=2.4k,...Ch. 18 - In an R-L parallel circuit, ET=480 volts, R=16,...Ch. 18 - In an R-L parallel circuit, IT=1.25 amps, R=1.2k,...Ch. 18 - In an R-L parallel circuit, true power =4.6 watts...Ch. 18 - An R-L parallel circuit is connected to 240 volts...Ch. 18 - An R-L parallel circuit has an applied voltage of...
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