College Physics 11E Global Edition
11th Edition
ISBN: 9781337620338
Author: SERWAY/VUILLE
Publisher: CENGAGE Learning Custom Publishing
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Textbook Question
Chapter 21, Problem 65P
Police radar guns measure the speed of moving vehicles by transmitting
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generated worksheet
While cruising down University Boulevard you are stopped by a cop who states that you ran a red traffic light. Because you don't
want to pay the stiff fine, you are attempting a physics defense. You claim that due to the relativistic Doppler effect, the red color of
the light λ=616 nm appeared green '=531 nm to you. The cop makes a quick calculation of his own and rejects your defense.
How fast, in terms of your speed u divided by the speed of light in vacuum c, would you have to drive to justify your claim? Note
that the speed u is taken to be a positive quantity.
U 4.0
C
220 V is supplied to 800 primary turns of an autotransformer. What will the outputvoltage be across 200 secondary turns?
2. A filament transformer has a turns ratio of 1:20. What current must be supplied to theprimary windings if 5 A is required by the filament?
3. The filament transformer in the previous question is supplied with 150 V to theprimary side. What is the secondary voltage?
4. 440 V is supplied to 1000 primary turns of an autotransformer. If the desired outputvoltage is 100 V how many secondary turns must be tapped?
Chapter 21 Solutions
College Physics 11E Global Edition
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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- 220 volts is supplied across 1200 winding of the primary coil of the autotransformer.If 1650 windings are tapped, what voltage will be supplied to the primary coil of thehigh-voltage transformer?2. A kVp meter reads 86 kVp and the turns ratio of the high-voltage step-up transformeris 1200. What is the true voltage across the meter?3. The supply voltage from the autotransformer to the filament transformer is 60 volts. If theturns ratio of the filament transformer is 1/12, what is the filament voltage?4. If the current in the primary side of the filament transformer in question 3 were 0.5 A,what would be the filament current?5. The supply to a high-voltage step-up transformer with a turns ratio of 550 is 190 volts.What is the voltage across the x-ray tube?arrow_forward220 V is supplied to 800 primary turns of an autotransformer. What will the outputvoltage be across 200 secondary turns? 2. A filament transformer has a turns ratio of 1:20. What current must be supplied to theprimary windings if 5 A is required by the filament? 3. The filament transformer in the previous question is supplied with 150 V to theprimary side. What is the secondary voltage? 4. 440 V is supplied to 1000 primary turns of an autotransformer. If the desired outputvoltage is 100 V how many secondary turns must be tapped?arrow_forwardPlease solve and answer thw question correctly please. Thank you!!arrow_forward
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