Principles Of Electric Circuits
10th Edition
ISBN: 9780134879482
Author: Floyd, Thomas L.
Publisher: Pearson,
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Textbook Question
Chapter 3, Problem 6TFQ
Ohm’s law for finding current is I = V/R.
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For the circuit shown, I-20 mA, R₁ =10000 2, R2 =2000 Q, R3 -2000 Q, R₁-6000 2, Vcc 5 V and the
OPAMP is ideal with regions of operation are considered.
The output current lo in mA is (choose the closet value):
R₂
Is
R₁
W
VCC
-VCC
The relative tolerance for this problem is 1 %.
-0.458
-0.833
6.667
-6.667
○ 0.458
0.833
w
R3
w
RL
For the circuit shown, let R₁-4, R2-50, R3-2, R4-77 and Vin-18.
Find the current I₁ and voltage Vo as follows:
Use op-amp building blocks to determine the voltage Vo1: V01 =
Then use Vo1 to find the current 11: 1₁ =
Find the voltage Vo: Vo=
R1
www
Vin
R₂
ww
V01 R3
The relative tolerance for this problem is 9 %.
+
R4
www
+5°
For the circuit shown, let Vs1 = 13, Vs2 = 7 R1-10, R2= 50, assume ideal-op-amp, and find
• The current Is
• The output voltage Vo=
VSI
A
S
R₁
ww
1 R₂
www
V₁₂
+
V
Chapter 3 Solutions
Principles Of Electric Circuits
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Ch. 3 - If the resistor is changed in Figure 3-14 so that...Ch. 3 - If the total resistance of a circuit increases and...Ch. 3 - Ohms law for finding resistance is R = I/V.Ch. 3 - When milliamps and kilohms are multiplied...Ch. 3 - If a 10 k resistor is connected to a 10 V source,...Ch. 3 - The current in a fixed resistor is directly...Ch. 3 - Ohms law for finding current is I = V/R.Ch. 3 - When microamps and megohms are multiplied, the...Ch. 3 - When voltage is constant, current is inversely...Ch. 3 - Ohms law for finding voltage is V = I/R.Ch. 3 - When I is plotted as a function of V for a fixed...Ch. 3 - Ohms law states that 1. current equals voltage...Ch. 3 - When the voltage across a resistor is doubled, the...Ch. 3 - When 10 V are applied across a 20 resistor, the...Ch. 3 - When there are 10 mA of current through 1.0 k...Ch. 3 - If 20 V are applied across a resistor and there...Ch. 3 - A current of 250 A through a 4.7 k resistor...Ch. 3 - A resistance of 2.2 M is connected across a 1 kV...Ch. 3 - How much resistance is required to limit the...Ch. 3 - An electric heater draws 2.5 A from a 110 V...Ch. 3 - The current through a flashlight bulb is 20 mA and...Ch. 3 - If the current through a fixed resistor goes from...Ch. 3 - If the voltage across a fixed resistor goes from...Ch. 3 - A variable resistor has 5 V across it. If you...Ch. 3 - If the voltage across a resistor increases from 5...Ch. 3 - If larger voltages are applied and results are...Ch. 3 - If the IV curve for a larger value resistor is...Ch. 3 - If the voltmeter reading changes to 175 V, the...Ch. 3 - If is changed to a larger value and the voltmeter...Ch. 3 - If the resistor is removed from the circuit...Ch. 3 - If the resistor is removed from the circuit...Ch. 3 - If the rheostat is adjusted to increase the...Ch. 3 - If the rheostat is adjusted to increase the...Ch. 3 - If the fuse opens, the voltage across the heating...Ch. 3 - If the source voltage increases, the voltage...Ch. 3 - If the fuse is changed to one with a higher...Ch. 3 - If the lamp burns out (opens), the current a....Ch. 3 - If the lamp burns out, the voltage across it a....Ch. 3 - In a circuit consisting of a voltage source and a...Ch. 3 - State the formula used to find I when the values...Ch. 3 - State the formula used to find V when the values...Ch. 3 - State the formula used to find R when the values...Ch. 3 - A variable voltage source is connected to the...Ch. 3 - In a certain circuit, I = 5 mA when V = 1 V....Ch. 3 - Figure 322 is a graph of current versus voltage...Ch. 3 - Plot the currentvoltage relationship for a...Ch. 3 - Plot the currentvoltage relationship for a...Ch. 3 - Determine the current in each circuit in Figure...Ch. 3 - You are measuring the current in a circuit that is...Ch. 3 - (a) If you wish to increase the amount of current...Ch. 3 - Plot a graph of current versus voltage for voltage...Ch. 3 - Does the graph in Problem 13 indicate a linear...Ch. 3 - Figure 3-24 shows an IV curve for a certain light...Ch. 3 - For the bulb graphed in Figure 3-24, what is the...Ch. 3 - Determine the current in each case: a. V = 5 V, R...Ch. 3 - Determine the current in each case: a. V = 9 V, R...Ch. 3 - Assume 200 mV is across a 330 m current sensing...Ch. 3 - A certain resistor has the following color code:...Ch. 3 - A 4-band resistor is connected across the...Ch. 3 - A 5-band resistor is connected across a 12 V...Ch. 3 - If the voltage in Problem 22 is doubled, will a...Ch. 3 - A certain rear window defroster has a resistance...Ch. 3 - If the voltage of the battery in problem 24 drops...Ch. 3 - The potentiometer connected as a rheostat in...Ch. 3 - A 270 current-limiting resistor has a voltage of...Ch. 3 - A small solar cell is connected to a 27 k...Ch. 3 - Calculate the voltage for each value of I and R:...Ch. 3 - Calculate the voltage for each value of I and R:...Ch. 3 - Three amperes of current are measured through a 27...Ch. 3 - Assign a voltage value to each source in the...Ch. 3 - A 6 V source is connected to a 100 resistor by...Ch. 3 - Calculate the resistance of a rheostat for each...Ch. 3 - Calculate the resistance of a rheostat for each...Ch. 3 - Six volts is applied across a resistor. A current...Ch. 3 - The filament of a lamp in the circuit of Figure...Ch. 3 - A certain electrical device has an unknown...Ch. 3 - By varying the rheostat (variable resistor) in the...Ch. 3 - In the light circuit of Figure 329, identify the...Ch. 3 - Assume you have a 32-light string and one of the...
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- For the circuit shown, let R₁ =16 Q, R₂ =48 2, R3 = 28 2, R4 =84 02, R5 -2002, R6 -80 2, and V₁ =4 mV. Assume ideal op-amp, find (round your answer to three digits) : Va= (MV) Vb = (MV) (mA) Vout = (MV) R₁ R₂ V₁ + R3 Vb W The relative tolerance for this problem is 7 %. ww R4 24 R5 55 R6 VOUTarrow_forwardFor the circuit shown, find the voltage Vo and current l。. Let R₁=8, R2=1, R3-11 and V₂-3. V S (+1 || w R₂ R1 + R3 Vo The voltage Vo is: The current lo is: The relative tolerance for this problem is 3 %.arrow_forwardFor the circuit shown, find currents 11, 12, 13, and the voltage Vo. Assume ideal op-amp, and let R₁=3, R2-40, Ro=85 and 1-6 The current I₁ is: The current 12 is: The current 13 is: The voltage Vo is: R₂ w R₁ 13 w Roarrow_forward
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- Chapter 14, Problem 57. Determine the center frequency and bandwidth of the bandpass filters in Fig. 14.88. 1 F ΙΩ ww V. (+ 1 F 10 V 1 H m (a) (b) ΙΩ ww ΙΩ 1HV Figure 14.88 For Prob. 14.57.arrow_forwardChapter 14, Problem 43. Calculate the resonant frequency of each of the circuits in Fig. 14.82. C (a) Figure 14.82 For Prob. 14.43. (b) C Larrow_forwardChapter 14, Problem 69. end Design the filter in Fig. 14.94 to meet the following requirements: (a) It must attenuate a signal at 2 kHz by 3 dB compared with its value at 10 MHz. (b) It must provide a steady-state output of v。 (t) input v, (t)=4sin(2 × 108t) V. = 10 sin(2x 108t+ 180°) V for an Rf ww R ww C 1+ Vs Figure 14.94 For Prob. 14.69.arrow_forward
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