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 30P
An electric heater works on 115 V and draws 3 A of current. How much power does it use?
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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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- 8.19 In the circuit shown in Fig. P8.19, u(t) = 40cos(105t) V,R1 = 100 W, R2 = 500 W, C = 0.1 μF, and L = 0.5 mH.Determine the complex power for each passive element, and verifythat conservation of energy is satisfied.arrow_forwardIn the circuit shown, let R₁=7, R₂=12, R3=24, R4-2, V₁ =26, V2=104, and V3-78, to calculate the power delivered (or absorbed) by the circuit inside the box, as follows: {NOTE: On Multiple Choice Questions, like this problem, you have only one attempt } 1. The current I is equal to (choose the closed values in amperes) O 1.156 -1.156 -1.209 -4.622 1.209 0 (A) 4.622 2. The power delivered (or absorbed) (choose the closest value in watts) (W) -873.292 152.225 O 873.292 -122.181 -58.086 0 O 122.181 R₁ ww V₂ R₂ R3 V1 ww R4 √3arrow_forwardFor the circuit shown, find the currents 11, 12, 16 and 17, given 13 =1 A, 14-19 A, 15 =-10 A, and Ig =5 A. = (A) 12 = (A) 16 = (A) 175 (A) (Based on Alexander Textbook, Chapter2) I5 12 14 18 13 16 • Round your values to 3-significant digits.arrow_forward
- In the circuit shown, let R₁=62, R2=39, R3=16, R4-7 and V5-194, to calculate Vo and lo, as follows: V₁ R1 R3 Find the overall current i delivered by the voltage source Vs: • Find the voltage Vo: • Find the current l₁ : The relative tolerance for this problem is 7 %. (V) (A) www. R₂ + RA (A)arrow_forwardFor the circuit shown, let V₁ =35 V, V₂-7 V, and R=45 $2, ⚫ The current I = • The power absorbed by the resistor R; PR (A) find: • The power delivered/absorbed by the voltage source V₁; Pv₁= ⚫ The power delivered/absorbed by the voltage source V2; Pv2= ⚫ The power delivered/absorbed by the voltage source (-8V); P-8 = V₁ (1+ √2 + (+ −8 V (W) (W) (W) (W) Rarrow_forwardUsing simulation in MATLAB and show the results signal.arrow_forward
- An elliptically polarized wave traveling in -ve z-direction is received by circularly polarized antenna. 11 the unit vector of the incident wave is w = wave would be right hand CP. 2âx-jay. Find PLF (dimensionless) when the transmittedarrow_forwardAn elliptically polarized wave traveling in the negative z-direction is received by a circularly polarized antenna. The vector describing the polarization of the incident wave is given by Ei= 2ax + jay .Find the polarization loss factor PLF (dimensionless and in dB) when the wave that would be transmitted by the antenna is (a) right-hand CP (b) left-hand CP.arrow_forwardFind V show all stepsarrow_forward
- A wave radiated by an antenna is traveling in the outward radial direction along the +z axis. Its radiated field in the far zone region is described by its spherical components, and its polarization is right-hand (clockwise) circularly polarized. This radiated field impinging upon a receiving antenna whose polarization is also right-hand (clockwise) circularly polarized and whose polarization unit vector is represented by (ao-jas) E₁ = E(7,0,0) (0-100) Determine the polarization loss factor (PLF)arrow_forwardFind V0, it's an ideal Op-amparrow_forwardFjjrjarrow_forward
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