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 3, Problem 21P
What is the powe in watts when 7500 J of energy are used in 5 h?
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Chapter 3 Solutions
Electronics Fundamentals: Circuits, Devices & Applications
Ch. 3 - If the total resistance of a circuit increases,...Ch. 3 - Ohm’s law for finding resistance is R=1/V.Ch. 3 - When milliamps and kilohms are multiplied...Ch. 3 - If a 10k resistor is connected to a 10 V source,...Ch. 3 - Prob. 5TFQCh. 3 - Prob. 6TFQCh. 3 - Prob. 7TFQCh. 3 - Prob. 8TFQCh. 3 - A power supply that has a negative output voltage...Ch. 3 - Prob. 10TFQ
Ch. 3 - Ohm’s law states that current equals voltage...Ch. 3 - When the voltage across a resistor is doubled, the...Ch. 3 - Prob. 3STCh. 3 - Prob. 4STCh. 3 - Prob. 5STCh. 3 - Prob. 6STCh. 3 - Prob. 7STCh. 3 - Prob. 8STCh. 3 - Prob. 9STCh. 3 - Prob. 10STCh. 3 - A 2.2k resistor dissipates 0.5 W. The current is...Ch. 3 - Prob. 12STCh. 3 - Prob. 13STCh. 3 - Prob. 14STCh. 3 - Prob. 15STCh. 3 - Determine the cause for each set of symptoms....Ch. 3 - Determine the cause for each set of symptoms....Ch. 3 - Prob. 3TSCCh. 3 - Determine the cause for each set of symptoms....Ch. 3 - Prob. 5TSCCh. 3 - The current in a circuit is 1 A. Determine what...Ch. 3 - Prob. 2PCh. 3 - The current in a circuit is 10 mA. What will the...Ch. 3 - Determine the current in each case. V=5V,R=1.0...Ch. 3 - Determine the curren in each case. V=9V,R=2.7k...Ch. 3 - A 10 resistor is connected across a 12 V battery....Ch. 3 - A resistor is connected across the terminals of a...Ch. 3 - A 5-band resistor is connected across a 12 V...Ch. 3 - If the voltage in Problem 8 is doubled, will a 0.5...Ch. 3 - Calculate the voltage for each value of IandR....Ch. 3 - Calculate the voltage for each value of l 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 - Calculate the resistance for each value of V and...Ch. 3 - Calculate R for each set of V and I values....Ch. 3 - Six volts are applied across a resistor. A current...Ch. 3 - Choose the correct value of resistance to get the...Ch. 3 - A flashlight is operated from 3.2 V and has a...Ch. 3 - The flashlight in Problem 18 uses 26 J in 10 s....Ch. 3 - What is the power when energy is used at the rate...Ch. 3 - What is the powe in watts when 7500 J of energy...Ch. 3 - Convert the following to kilowatts:...Ch. 3 - Convert the following to megawatts: 1,000.000W...Ch. 3 - Convert the following to milliwatts:...Ch. 3 - Convert the following to microwatts:...Ch. 3 - Convert the following to watts:...Ch. 3 - Prove that the unit for power (the watt) is...Ch. 3 - Show that there are 3.6106 joules in a...Ch. 3 - If a resistor has 5.5 V across it and 3 mA through...Ch. 3 - An electric heater works on 115 V and draws 3 A of...Ch. 3 - What is the power when there are 500 mA of current...Ch. 3 - Calculate the power dissipated by a 10k resistor...Ch. 3 - If there are 60 V across a 620 resistor,what is...Ch. 3 - A 56 resistor is connected across the terminals of...Ch. 3 - If a resistor is to carry 2 A of current and...Ch. 3 - Convert 5106 watts used for 1 minute to kWh.Ch. 3 - Convert 6700 watts used for 1 second to kWh.Ch. 3 - How many kilowatt-hours do 50 W used for 12 h...Ch. 3 - Assume that an alkaline D-cell battery can...Ch. 3 - What is the total energy in joules that is...Ch. 3 - A 6.8k resistor has burned out in a circuit. You...Ch. 3 - A certain type of power resistor comes in the...Ch. 3 - For each circuit in Figure 3-31, assign the proper...Ch. 3 - A 50 load consumes 1 W of power. What is the...Ch. 3 - A battery can provide an average of 1.5 A of...Ch. 3 - How much average current can be drawn from an 80...Ch. 3 - If a battery is rated at 650mAh, how much average...Ch. 3 - If the input power is 500mW and the output power...Ch. 3 - To operate at 85% efficiency, how much output...Ch. 3 - In the light circuit of Figure 3-32, identify the...Ch. 3 - Assume you have a 32-light string and one of the...Ch. 3 - Prob. 52PCh. 3 - The filament of a light bulb in the circuit of...Ch. 3 - A certain electrical device has an unknown...Ch. 3 - A variable voltage source is connected to the...Ch. 3 - In a certain circuit, Vs=1Vandl=5mA. Determine the...Ch. 3 - Figure 3-35 is a graph of current versus voltage...Ch. 3 - You are measuring the current in a circuit tha is...Ch. 3 - If you wish to increase the amount of current in a...Ch. 3 - A 6 V source is connected to a 100 resistor by two...Ch. 3 - If a 300 W bulb is allowed to burn continuously...Ch. 3 - At the end of a 31 day period, your utility bill...Ch. 3 - A certain type of power resistor comes in the...Ch. 3 - A 12 V source is connected across a 10 resistor...Ch. 3 - The rheostat in Figure 3-36 is used to control the...Ch. 3 - Open file P03-66; files are found at...Ch. 3 - Open file P03-67. Determine whether or not the...Ch. 3 - Open file P03-68. Determine whether or not the...Ch. 3 - Open file P03-69. Determine whether or not the...Ch. 3 - Open file P03-70. Determine whether or not the...
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- DUC 1. In Fig. 12-4, what are the functions of the VR1 and VR2? 2. In Fig. 12-4, what is the function of the VR3? VR₁ 50k C₁ R1 0.1 100k Carrier Input U₁ A741 PWM signal input R41k www Re 1k w C7 ± 10μT R7 100 ww =L H C4 2.2 H W82 Rs 51 3 10 U3 MC1496 C2 R2 U2 A741 22 0.1 100k VR2 50k VR3 100kr 14 C3 10μ 1k 0.1 4 5 6 12 m Re 10k R9 R102 3.9k 3.9k HHI C10 0.1 -0 +12V C11 R 0.02 100k +12 V Demodulated output C R11 R12 A741 0.33 10k 100k -12 V Ca 1μ C12 1500p PRODUC Fig. 12-4 PWM demodulator PRODUCTSarrow_forward10.37 Use mesh analysis to find currents I₁, I2, and I3 in the circuit of Fig. 10.82. ML 120-90° V 120 -30° V Figure 10.82 For Prob. 10.37. N N Z=80-135arrow_forward3. Find the phasor current I。 in the circuit shown below. Be aware of the direction markings. (15 pts) 1052 I 5057 ①520 Amps 2012 j5052arrow_forward
- 10.93 Figure 10.135 shows a Colpitts oscillator. Show that the ed oscillation frequency is 1 fo= 2π √√LCT where CTC₁C2/(C₁ + C₂). Assume R; >>> R₁ + Rf ww Vo L m C₂ C₁ 5 Xci Figure 10.135 A Colpitts oscillator; for Prob. 10.93. (Hint: Set the imaginary part of the impedance in the feedback circuit equal to zero.)arrow_forwardDetermine (a) the average and (b) rms values of the periodiccurrent waveform shown in Fig. P8.3.arrow_forward10.68 Find the Thevenin equivalent at terminals a-b in the circuit of Fig. 10.111. ML 6 sin 10t V 492 Figure 10.111 For Prob. 10.68. 5913 + 410 + -2 F 20 1H Vo obarrow_forward
- 10.79 For the op amp circuit in Fig. 10.122, obtain Vo. 5 cos 10³t V(+ Figure 10.122 For Prob. 10.79. 10 ΚΩ www 20 ΚΩ www 0.1 µF 40 ΚΩ 0.2 μFarrow_forward10.19 Obtain V, in Fig. 10.68 using nodal analysis. # ML ΖΩ j20 m 12/0° V 492 (+ ww www ' < ་ + V -j4 0.2V Figure 10.68 For Prob. 10.19.arrow_forward10.47 Determine i, in the circuit of Fig. 10.92, using the superposition principle. ML 10 sin(t -30°) V 1Ω www Figure 10.92 For Prob. 10.47. 96 F 202 www 24 V +) 2 H m io 2 cos 3t www 42arrow_forward
- 10.53 Use the concept of source transformation to find V, in the circuit of Fig. 10.97. 492 www -j30 j40 m + 20/0° V(+ j20 ΖΩ www -120 V ° Figure 10.97 For Prob. 10.53.arrow_forward2. Given you have a real valued signal with the following single sided baseband signal spectrum: ↑ ❘m(f)| A f=0 500 750 Sketch the frequency domain of |X(f)| given: a. x1(t) =m(t)cos(2**5000*) b. x2(t)=m(t)cos(2**600) Frequency (Hz)arrow_forwardwhat is deference between full Adder and Half?arrow_forward
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