EBK PRINCIPLES OF ELECTRIC CIRCUITS
10th Edition
ISBN: 9780134880068
Author: Buchla
Publisher: VST
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Chapter 4, Problem 7TFQ
The amount of heat that a resistor can dissipate is proportional to its surface area.
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Chapter 4 Solutions
EBK PRINCIPLES OF ELECTRIC CIRCUITS
Ch. 4 - If 100 W of power occurs for 30 s, how much...Ch. 4 - Express the following amounts of power in watts...Ch. 4 - Prob. 3RPCh. 4 - How many kilowatt-hours are used by a 1/2 hp motor...Ch. 4 - Determine P in each circuit of Figure 4-2 for the...Ch. 4 - A 100 W light bulb operates on 120 V. How much...Ch. 4 - Prob. 7RPCh. 4 - A 0.25 W, 1.0 k resistor is connected across a 12...Ch. 4 - How will the total power delivered change if the...Ch. 4 - A power supply has an efficiency of 92%. If PIN is...
Ch. 4 - A certain battery delivers 10 A for 6 h. What is...Ch. 4 - The kilowatt-hour is a unit of power.Ch. 4 - One watt is equal to one joule per second.Ch. 4 - 0.050 W is the same as 50 mW.Ch. 4 - Prob. 4TFQCh. 4 - The kilowatt and the horsepower are both units of...Ch. 4 - The power rating of a resistor should always be...Ch. 4 - The amount of heat that a resistor can dissipate...Ch. 4 - If the voltage across a resistor doubles, the...Ch. 4 - Watts law states that power equals voltage times...Ch. 4 - If the current through a resistor doubles, the...Ch. 4 - Within limits, a regulated power supply can...Ch. 4 - The efficiency of a power supply can be expressed...Ch. 4 - A power supply that has a negative output voltage...Ch. 4 - A battery Ah rating is a guide to the amount of...Ch. 4 - When analyzing a circuit problem, you should...Ch. 4 - Power can be defined as 1. energy 2. heat 3. the...Ch. 4 - Two hundred joules of energy are consumed in 10 s....Ch. 4 - If it takes 300 ms to use 10,000 J of energy, the...Ch. 4 - In 50 kW, there are 1. 500 W 2. 5,000 W 3. 0.5 MW...Ch. 4 - In 0.045 W, there are 1. 45 kW 2. 45 mW 3. 4,500 W...Ch. 4 - For 10 V and 50 mA, the power is 1. 500 mW 2. 0.5W...Ch. 4 - When the current through a 10 k resistor is 10 mA,...Ch. 4 - A 2.2 k resistor dissipates 0.5 W. The current is...Ch. 4 - A 330 resistor dissipates 2 W. The voltage is 1....Ch. 4 - If you used 500 W of power for 24 h, you have used...Ch. 4 - How many watt-hours represent 75 W used for 10 h?...Ch. 4 - A 100 resistor must carry a maximum current of 35...Ch. 4 - The power rating of a resistor that is to handle...Ch. 4 - A 22 half-watt resistor and a 220 half-watt...Ch. 4 - When the needle of an analog ohmmeter indicates...Ch. 4 - A 12 V battery is connected to a 600 load. Under...Ch. 4 - A given power supply is capable of providing 8 A...Ch. 4 - A power supply produces a 0.5 W output with an...Ch. 4 - If the current through a fixed resistor goes from...Ch. 4 - If the voltage across a fixed resistor goes from...Ch. 4 - A variable resistor has 5 V across it. If you...Ch. 4 - If the voltage across a resistor increases from 5...Ch. 4 - If the resistance of a load connected to a battery...Ch. 4 - If the amount of time that a battery supplies...Ch. 4 - If the current that a battery supplies to a load...Ch. 4 - If there is no load connected to a battery, its...Ch. 4 - If the output voltage of a power supply increases,...Ch. 4 - For a constant power supply output voltage, if the...Ch. 4 - For a constant power supply output voltage, if the...Ch. 4 - If the load is removed leaving the power supply...Ch. 4 - Prove that the unit for power (the watt) is...Ch. 4 - Show that there are 3.6 106 joules in a...Ch. 4 - What is the power when energy is consumed at the...Ch. 4 - How many watts are used when 7,500 J of energy are...Ch. 4 - How many watts does 1,000 J in 50 ms equal?Ch. 4 - Convert the following to kilowatts: 1. 1,000 W 2....Ch. 4 - Convert the following to megawatts: 1. 1,000,000 w...Ch. 4 - Convert the following to milliwatts: 1. 1 W 2. 0.4...Ch. 4 - Convert the following to microwatts: 1. 2 W 2....Ch. 4 - Convert the following to watts: 1. 1.5 kW 2. 0.5...Ch. 4 - Prob. 11PCh. 4 - If a 300 W bulb is allowed to burn continuously...Ch. 4 - At the end of a 31-day period, your utility bill...Ch. 4 - Convert 5 106 watt-minutes to kWh.Ch. 4 - Convert 6,700 watt-seconds to kWh.Ch. 4 - For how many seconds must there be 5 A of current...Ch. 4 - If a 75 V source is supplying 2 A to a load, what...Ch. 4 - If a resistor has 5.5 V across it and 3 mA through...Ch. 4 - An electric heater works on 120 V and draws 3 A of...Ch. 4 - What is the power when there are 500 mA of current...Ch. 4 - Calculate the power dissipated by a 10 k resistor...Ch. 4 - If there are 60 V across a 680 resistor, what is...Ch. 4 - A 56 resistor is connected across the terminals...Ch. 4 - If a resistor is to carry 2 A of current and...Ch. 4 - A 12 V source is connected across a 10 resistor....Ch. 4 - The maximum voltage is 1 V and the maximum current...Ch. 4 - A 6.8 k resistor has burned out in a circuit. You...Ch. 4 - A certain type of power resistor comes in the...Ch. 4 - For each circuit in Figure 414, assign the proper...Ch. 4 - A 50 load uses 1 W of power. What is the output...Ch. 4 - Assume that an alkaline D-cell battery can...Ch. 4 - What is the total energy in joules that is...Ch. 4 - A battery can provide an average of 1.5 A of...Ch. 4 - How much average current can be drawn from an 80...Ch. 4 - If a battery is rated at 650 mAh, how much average...Ch. 4 - If the input power is 500 mW and the output power...Ch. 4 - To operate at 85% efficiency, how much output...Ch. 4 - Prob. 39P
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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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