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 31P
In the circuit of Figure 5-71, determine resistance
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Determine the unknown voltage drop, 5, in Figure 5-35.
12 V
FIGURE 5-35
50
6V
15
SECTION 5-6 Kirchhoff's Voltage Law
32. The following voltage drops are measured across three resistors in series: 5.5 V, 8.2 V,
and 12.3 V. What is the value of the source voltage to which these resistors are
connected?
33. Five resistors are in series with a 20 V source. The voltage drops across four of the
resistors are 1.5 V, 5.5 V, 3 V, and 6 V. How much voltage is dropped across the fifth
resistor?
34. Determine the unspecified voltage drop(s) in each circuit of Figure 5-78. Show how to
connect a voltmeter to measure cach unknown voltage drop.
► FIGURE 5-78
2 V
V2
3.2 V
8 V
R
15 VE
2R
0.5 V
1.5 V
4 R
3R
(b)
A current source with parallel resistance can be converted into a
voltage source with
---- resistance.
series
parallel
series or parallel
O no
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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- Determine the resistances R4 and R5 in Figure 6arrow_forward53. Find RT in Figure 5-87. ➤FIGURE 5-87 R₂ 12 V www = 5,6 ΜΩ R₁ = 4.8 V Ry www P = 21.5 μWarrow_forwardThree resistors 10 Q, 15 Q, and 20 Q are connected in series across a 48-V source. What is the voltage across the 15-Q resistor?arrow_forward
- Determine the total parallel resistancearrow_forwardDetermine the unknown voltage drop, 1, in Figure 5-35. > FIGURE 5-35 12 V 50 6 V 15 Varrow_forwardThree identical 12 Q resistors are connected to a variable source in a mixed circuit. The circuit includes a 6.0 A fuse. R2 R Vo R3 Which of the following statements describes the potential difference across the resistors?arrow_forward
- 34. Determine the unspecified voltage drop(s) in each circuit of Figure 5-78. Show how to connect a voltmeter to measure cach unknown voltage drop. > FIGURE 5-78 3.2 V 8 V R R 15 V Vs 0.5 V 1.5 V 4R 3R in (a) (b)arrow_forwardTwo identical resistor is connected in parallel then connected to series to another pair identical of resistor, calculate the total resistance if the values are 10 ohms and 20 ohms respectively. O 25 ohms 35 ohms O 55 ohms 45 ohmsarrow_forwardCalculate Ig and VCE for the circuit in Figure 5-16 using the approximations VE = -1V and Ic Ip. Vc +15 V Rc 4.7 kn Rp 47 kn RE 10 kn Vnr -15 Varrow_forward
- The voltage drop of a series circuit is _____. a. the amount of voltage lost through any load b. proportional to the resistance in that part of the circuit c. equal to the voltage being applied to the circuit d. all of the abovearrow_forwardWrite the output expression for each circuit in Figure 5-54. A B C A B C (a) Figure 5-54 X D (b) Xarrow_forwardThe resistors are connected in series across a 120-V source. The first resistor is 50 Q, the current through the second resistor is 0.5 A, and the voltage drop across the third resistor is 50 V. What are the resistances of the first and third resistors ?arrow_forward
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