College Physics
10th Edition
ISBN: 9781285737027
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Textbook Question
Chapter 21, Problem 1P
(a) What is the resistance of a light bulb that uses an average power of 75.0 W when connected to a 60.0-Hz power source having a maximum voltage of 170. V? (b) What is the resistance of a 100.-W lightbulb?
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(a) What is the resistance of a lightbulb that uses an average power of 60.0 W when connected to a 60.0-Hz power source having a maximum voltage of 170 V?(b) What is the resistance of a 150-W lightbulb? (Assume the lightbulb uses an average power of 150 W when connected to a power source having a maximum voltage of 170 V.)
At its highest temperature, a space heater has a resistance of 47.5 ohms when it is plugged into a wall outlet that supplies a peak voltage of 162.6 V sinusoidally at 60 Hz.
What is the average power output of the space heater?
When a 5.3-μF capacitor is connected to a generator whose supply voltage is 43-V, the current in the circuit is observed to be 0.7-A. What is the frequency of the applied source?
Round your answer to 2 decimal places.
Chapter 21 Solutions
College Physics
Ch. 21.1 - Which of the following statements can be true for...Ch. 21.4 - For the circuit in Figure 21.8, is the...Ch. 21.4 - Prob. 21.3QQCh. 21.4 - Suppose XL XC in Figure 21.12. If switch A is...Ch. 21.4 - Suppose XL Xc in Figure 21.12. If switch A is...Ch. 21.4 - Prob. 21.6QQCh. 21.11 - In an apparatus such as the one in Figure 21.22....Ch. 21.12 - Which of the following statements are true about...Ch. 21 - An RLC circuit connected across an AC voltage...Ch. 21 - (a) Does the phase angle in an RLC series circuit...
Ch. 21 - Prob. 3CQCh. 21 - Receiving radio antennas can be in the form of...Ch. 21 - The following statements are related to an RLC...Ch. 21 - Prob. 6CQCh. 21 - In space sailing, which is a proposed alternative...Ch. 21 - Prob. 8CQCh. 21 - A resistor, capacitor, and inductor are connected...Ch. 21 - Prob. 10CQCh. 21 - Why should an infrared photograph of a person look...Ch. 21 - If a high-frequency current is passed through a...Ch. 21 - Prob. 13CQCh. 21 - Why is the sum of the maximum voltages across each...Ch. 21 - If the resistance in an RLC circuit remains the...Ch. 21 - An inductor and a resistor are connected in series...Ch. 21 - A capacitor and a resistor are connected in series...Ch. 21 - Prob. 18CQCh. 21 - Which of the following statements is true...Ch. 21 - (a) What is the resistance of a light bulb that...Ch. 21 - Prob. 2PCh. 21 - A 1.5-k resistor is connected to an AC voltage...Ch. 21 - Figure P21.4 show three lamp connected to a 120.-V...Ch. 21 - A 24.0-k resistor connected to an AC voltage...Ch. 21 - The output voltage of an AC generator is given by...Ch. 21 - (a) For what frequencies does a 22.0-F capacitor...Ch. 21 - North American outlets supply AC electricity with...Ch. 21 - When a 4.0-F capacitor is connected to a generator...Ch. 21 - An AC generator with an output rms voltage of 36.0...Ch. 21 - What maximum current is delivered by an AC source...Ch. 21 - A generator delivers an AC voltage of the form v =...Ch. 21 - Prob. 13PCh. 21 - An AC power source has an rms voltage of 120 V and...Ch. 21 - In a purely inductive AC circuit as shown in...Ch. 21 - The output voltage of an AC generator is given by...Ch. 21 - Prob. 17PCh. 21 - A sinusoidal voltage v = (80.0 V) sin (150t) is...Ch. 21 - A series RLC circuit has resistance R = 50.0 and...Ch. 21 - An inductor (L = 400. mH), a capacitor (C = 4.43...Ch. 21 - A resistor (R = 9.00 102 ), a capacitor (C =...Ch. 21 - A 50.0-H resistor, a 0.100-H inductor, and a...Ch. 21 - A series RLC circuit has resistance R = 12.0 ,...Ch. 21 - An AC source operating at 60. Hz with a maximum...Ch. 21 - A person is working near the secondary of a...Ch. 21 - A 60.0- resistor is connected in series with a...Ch. 21 - A series AC circuit contains a resistor, an...Ch. 21 - At what frequency does the inductive reactance of...Ch. 21 - An AC source with a maximum voltage of 150. V and...Ch. 21 - An AC source operating at 60. Hz with a maximum...Ch. 21 - A multimeter in an RL circuit records an rms...Ch. 21 - Prob. 32PCh. 21 - An RLC circuit has resistance R = 225 and...Ch. 21 - Prob. 34PCh. 21 - An inductor and a resistor are connected in...Ch. 21 - Consider a series RLC circuit with R = 25 , L =...Ch. 21 - An RLC circuit is used in a radio to tune into an...Ch. 21 - The resonant frequency of a certain series RLC...Ch. 21 - The AM bind extends from approximately 300. kHz to...Ch. 21 - Electrosurgical units (ESUs) supply high-frequency...Ch. 21 - Two electrical oscillators are used in a...Ch. 21 - A series circuit contains a 3.00-H inductor, a...Ch. 21 - The primary coil of a transformer has N1 = 250....Ch. 21 - A step-down transformer is used for recharging the...Ch. 21 - An AC power generator produces 50. A (rms) at 3...Ch. 21 - An ideal neon sign transformer provides 9 250 V at...Ch. 21 - Prob. 47PCh. 21 - A transmission line that has a resistance per unit...Ch. 21 - The U.S. Navy has long proposed the construction...Ch. 21 - (a) The distance to Polaris, the North Star, is...Ch. 21 - Prob. 51PCh. 21 - The speed of light in vacuum is defined to be...Ch. 21 - Oxygenated hemoglobin absorbs weakly in the red...Ch. 21 - Operation of the pulse oximeter (see previous...Ch. 21 - Prob. 55PCh. 21 - A laser beam is used to levitate a metal disk...Ch. 21 - Prob. 57PCh. 21 - Prob. 58PCh. 21 - Prob. 59PCh. 21 - A diathermy machine, used in physiotherapy,...Ch. 21 - What are the wavelength ranges in (a) the AM radio...Ch. 21 - An important news announcement is transmitted by...Ch. 21 - Prob. 63PCh. 21 - A spaceship is approaching a space station at a...Ch. 21 - Police radar guns measure the speed of moving...Ch. 21 - A speeder tries to explain to the police that the...Ch. 21 - A 25.0-mW laser beam of diameter 00 mm is...Ch. 21 - The intensity of solar radiation at the top of...Ch. 21 - Prob. 69APCh. 21 - In an RLC series circuit that includes a source of...Ch. 21 - As a way of determining the inductance of a coil...Ch. 21 - (a) What capacitance will resonate with a one-turn...Ch. 21 - A dish antenna with a diameter of 20.0 m receives...Ch. 21 - A particular inductor has appreciable resistance....Ch. 21 - Prob. 75APCh. 21 - Prob. 76AP
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- At its highest temperature, a space heater has a resistance of 25.5 Q when it is plugged into a wall outlet that supplies a peak voltage of 162.6 V sinusoidally at 60 Hz. What is the average power output P of the space heater? P = Warrow_forwardG01arrow_forwardA 60-Hz AC generator develops a peak voltage of 170- V. The generator is connected to a lightbulb whose resistance when operating is 24002. Calculate an expression for the variation of current through the bulb with time.arrow_forward
- (a) What is the resistance of a 210 V AC short circuit that generates a peak power of 97.4 kW? (b) What would the average power be if the voltage was 120 V AC? kWarrow_forward(a) What is the resistance of a lightbulb that uses an average power of 65.0 W when connected to a 60.0 Hz power source having a maximum voltage of 180 V? Ω (b) What is the resistance of a 110 W bulb? 2 Needarrow_forwardWhat is the peak current through a 1200 W microwave oven operating at 120-V AC?arrow_forward
- How many KWh of energy does a 650-W toaster use in the morning if it is in operation for a total of 4.5 MIN?arrow_forwardA power transmission line is used to transmit 100 kW of power at a voltage of 10 kV with a loss of 1 kW. If the voltage is increased to 200 kV, what is power loss to transmit the same amount of power?arrow_forwardThe figure shows variation of the current through the heating element with time in an iron when it is plugged into a standard 120 V, 60 Hz outlet. a) What is the resistance of the iron (in Ω)? b) What is the peak voltage (in V)? c) What is the average power (in W)?arrow_forward
- A 60-Hz AC generator develops a peak voltage of 170-V. The generator is connected to a lightbulb whose resistance when operating is 240Ω. Calculate an expression for the variation of current through the bulb with time. Use the formula: i=Vo/R sin(2πft)arrow_forward. If the peak value of the alternating current in a 950 W device is 5.0 A, then what is the rms voltage across it?arrow_forwardExample: (a) What is the value of the peak voltage for 120-V AC power? (b) What is the peak +V, power consumption rate of a 60.0-W AC light bulb? For (a): -Vo Solving the equation Vrms= for the peak voltage Vo and substituting the known value for Vms gives: Vo=2-vZVrms=1.414(120 V)= 170 V. This means that the AC voltage swings from 170 V to -170 V and back 60 times every second. An equivalent DC voltage is a constant 120 V. For (b): Peak power is peak current times peak voltage. Thus, Figure 2. The potential difference V between the terminals of an AC voltage So the power swings from zero to 120 W on hundred twenty times per second (twice each cycle), and the power averages 60 W. fluctuates shown. The Po= loVo = 2(; loVo) = 2Pave. source as mathematical expression for V is given by V = Vosin2nft Po = 2(60.0 W) = 120 W. Average power Activity: Given a transmission line having a line resistance of 5.000 sove for the following. Use the rubrics as your guide in presenting your solution…arrow_forward
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