Electronics Fundamentals: Circuits, Devices & Applications
8th Edition
ISBN: 9780135072950
Author: Thomas L. Floyd, David Buchla
Publisher: Prentice Hall
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Textbook Question
Chapter 5, Problem 47P
A certain parallel circuit consists of five
As you slowly increase the voltage across the parallel circuit, the total current slowly increases. Suddenly, the total current drops to a lower value.
- Excluding a power supply failure, what happened?
- What is the maximum voltage you should have applied?
- Specifically, what must be done to repair the fault?
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Q)A certain parallel circuit consists of only 0.5 W resistors. The total resistance is 1.0 K Ω, and the total current is 50 mA. If each resistor is operating at one-half its maximum power level, determine the following:
(a) The number of resistors (b) The value of each resistor
(c) The current in each branch (d) The applied voltage
7.
"The total power in a series/parallel circuit with a voltage source of 30V, a current of 20mA in the series branch, and a current of 10mA in each of the two parallel branch circuits is _________"
1.5W
1.2W
0.9W
0.6W
none of the above
What is the applied voltage on a circuit in which 0.5A is flowing and 10 W is generated?
2V
5V
20V
50V
none of the above
"When the resistance of a series string decreases, _______________"
total current decreases.
individual resistor voltage drops increase.
applied voltage increases.
circuit current remains the same.
none of the above
In a parallel circuit, the current flow through each load resistor:(a) varies according to the resistance value of the resistor.(b) is exactly the same value.(c) is greater for resistors with low resistance values.(d) is greater for resistors with high resistance values.
In a series circuit, the amount of voltage each load receives is:
(a)inversely proportional to the resistance value of the load.
(b)the same as the applied voltage.
(c)determined by its position in the series string.
(d)directly proportional to the resistance value of the load.
Which of the following is incorrect?
(a)The total resistance of a parallel circuit is always lower than its lowest branch resistance.
(b)The total resistance of a parallel circuit is inversely proportional to the total current.
(c)The total resistance of a parallel circuit is directly proportional to the total current.
(d)The total resistance of a parallel circuit is always higher than its…
Chapter 5 Solutions
Electronics Fundamentals: Circuits, Devices & Applications
Ch. 5 - Prob. 1TFQCh. 5 - The total resistance of parallel resistors is...Ch. 5 - The product-over-sum rule works for any number of...Ch. 5 - In a parallel circuit, the voltage is larger on a...Ch. 5 - Prob. 5TFQCh. 5 - Prob. 6TFQCh. 5 - Prob. 7TFQCh. 5 - In the current-divider formula, Ix=(RT/Rx)lT, the...Ch. 5 - Prob. 9TFQCh. 5 - The total power dissipated by parallel resistors...
Ch. 5 - In a parallel circuit, each resistor has the same...Ch. 5 - When a 1.2k resistor and a 100 resistor are...Ch. 5 - Prob. 3STCh. 5 - Eight resistors are in parallel. The two...Ch. 5 - When an additional resistor is connected across an...Ch. 5 - If one of the resistors in a parallel circuit is...Ch. 5 - The currents into a node are along two paths. One...Ch. 5 - Prob. 8STCh. 5 - Prob. 9STCh. 5 - Prob. 10STCh. 5 - In a certain three-branch parallel circuit,...Ch. 5 - Prob. 12STCh. 5 - Prob. 13STCh. 5 - Prob. 14STCh. 5 - Determine the cause for each set of symptoms....Ch. 5 - Prob. 2TSCCh. 5 - Prob. 3TSCCh. 5 - Prob. 4TSCCh. 5 - Determine the cause for each set of symptoms....Ch. 5 - Connect the resistors in Figure 5-57 in parallel...Ch. 5 - Determine whether or not all the resistors in...Ch. 5 - Determine the total resistance between pins 1 and...Ch. 5 - The following resistors are connected in parallel:...Ch. 5 - Find the total resistance between nodes A and B...Ch. 5 - Calculate RT for each circuit in Figure 5-60.Ch. 5 - What is the total resistance of eleven 22k...Ch. 5 - Five 15, ten 100, and two 10 resistors are all...Ch. 5 - Determine the voltage across and the current...Ch. 5 - The source voltage in Figure 5-61 is 100 V. How...Ch. 5 - Prob. 11PCh. 5 - The resistance of a 60 W bulb is approximatey 240....Ch. 5 - What is the current in each resistor for the...Ch. 5 - Four equal-value resistors are connected in...Ch. 5 - The following currents are measured in the same...Ch. 5 - There is a total of 500mA of current into five...Ch. 5 - How much current is through R2 and R3 in Figure...Ch. 5 - A trailer has four running lights that draw 0.5A...Ch. 5 - Assume the trailer in Problem 18 has two brake...Ch. 5 - A 10k resistor and a 15k resistor are in parallel...Ch. 5 - How much branch current should each meter in...Ch. 5 - Prob. 22PCh. 5 - Five parallel resistors each handle 40mW. What is...Ch. 5 - Prob. 24PCh. 5 - Six light bulbs are connected in parallel across...Ch. 5 - If one of the bulbs burns out in Problem 25, how...Ch. 5 - In Figure 5-67, the current and voltage...Ch. 5 - Prob. 28PCh. 5 - Find the open resistor in Figure 5-69.Ch. 5 - From the ohmmeter reading in Figure 5-70, can you...Ch. 5 - In the circuit of Figure 5-71, determine...Ch. 5 - The total resistance of a parallel circuit is 25....Ch. 5 - What is the current through each resistor in...Ch. 5 - A certain parallel circuit consists of only 12W...Ch. 5 - Find the values of the unspecified quantities...Ch. 5 - What is the total resistance between terminal A...Ch. 5 - What value of R2 in Figure 5-75 will cause...Ch. 5 - Determine the total current from the source and...Ch. 5 - The electrical circuit in a room is protected with...Ch. 5 - The total resistance of a parallel circuit is 25....Ch. 5 - Prob. 41PCh. 5 - If the total resistance in Figure 5-78 is 200,...Ch. 5 - Determine the unknown resistances in Figure 5-79.Ch. 5 - There is a total of 250 mA into a parallel circuit...Ch. 5 - Prob. 45PCh. 5 - Develop a test procedure to check the circuit in...Ch. 5 - A certain parallel circuit consists of five 12W...Ch. 5 - For the circuit board shown in Figure 5-82,...Ch. 5 - For the circuit board shown in Figure 5-82,...Ch. 5 - Open file P05-50; files are found at...Ch. 5 - Open file P05-51. Using current measurements,...Ch. 5 - Open file P05-52. Using current measurements,...
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