Modified Mastering Physics without Pearson eText-- Instant Access -- for Physics for Scientists & Engineers with Modern Physics
5th Edition
ISBN: 9780134402659
Author: GIANCOLI, Douglas
Publisher: PEARSON
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Chapter 31, Problem 11Q
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Explain the effect when two wires of unequal length connect two loudspeakers to the output of a stereo amplifier.
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When you connect two loudspeakers to the output of a stereoamplifier, should you be sure the lead-in wires are equal inlength to avoid a time lag between speakers? Explain.
C2 (ii). A sinusoidal waveform is displayed
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20 us/cm and the volt/cm switch is on 50
V/cm. The width of one complete cycle is 3.4
cm and the peak to peak distance is 5.6
cm.
Determine the following:
The frequency is
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The amplitude is
An electronics hobbyist is building a radio set to receive the AM band, with frequencies from 520 kHz to 1700 kHz. The antenna, which also serves as the inductor in an LC circuit, has an inductance of 230 μH. She needs to add a variable capacitor whose capacitance she can adjust to tune the radio. What is the minimum capacitance the capacitor must have? The maximum value?
Chapter 31 Solutions
Modified Mastering Physics without Pearson eText-- Instant Access -- for Physics for Scientists & Engineers with Modern Physics
Ch. 31 - An electric field E points away from you, and its...Ch. 31 - Prob. 2QCh. 31 - Prob. 3QCh. 31 - The electric field in an EM wave traveling north...Ch. 31 - Is sound an electromagnetic wave? If not, what...Ch. 31 - Can EM waves travel through a perfect vacuum? Can...Ch. 31 - When you flip a light switch, does the overhead...Ch. 31 - Are the wavelengths of radio and television...Ch. 31 - What does the wavelength calculated in Example...Ch. 31 - Prob. 11Q
Ch. 31 - In the electromagnetic spectrum, what type of EM...Ch. 31 - Can radio waves have the same frequencies as sound...Ch. 31 - Discuss how cordless telephones make use of EM...Ch. 31 - Electromagnetic waves and sound waves can have the...Ch. 31 - What is the minimum angular speed at which...Ch. 31 - Prob. 37PCh. 31 - What size should the solar panel on a satellite...Ch. 31 - What is the range of wavelengths for (a) FM radio...Ch. 31 - Prob. 52GPCh. 31 - Prob. 54GPCh. 31 - Prob. 79GP
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- Figure CQ20.7 shows a slidewire generator with motional cmf 0 when the wire at A slides across the top and bottom rails at constant velocity v0. (a) When the wire reaches B so that the area enclosed by the circuit is doubled, determine the ratio of the new cmf to the original cmf, /0. (b) If the wire's speed is doubled so that v = 2v0 determine the ratio /0. Figure CQ20.7arrow_forwardDo Kirchhoff’s rules apply to circuits that contain inductors and Capacitors?arrow_forwardIn Figure 33.9A (page 1052), the switch is closed at a at t = 0. Find an expression for the power dissipated by the resistor as a function of time, and sketch your result. Is the power lost greater as soon as the switch is closed or a long time after it has been closed? Does your answer make sense?arrow_forward
- The capacitor in Figure 23.55(b) will filler high—frequency signals by shorting them to earth/ground. (a) What capacitance is needed to produce a reactance of 10-0 m for a 5.00 kHz signal? (b) What would its reactance be at 3.00 Hz? (c) Discuss the implications of your answers to (a) and (b).arrow_forwardThe self-inductance and capacitance of an LC circuit e 0.20 mH and 5.0 pF. What is the angular frequency at which the circuit oscillates?arrow_forwardThe lowest frequency in the FM radio band is 87.5 MHz. (a) What inductance is needed to produce this resonant frequency if it is connected to a 3.50 pF capacitor? µH (b) The capacitor is variable, to allow the resonant frequency to be adjusted to as high as 108 MHz. What must the capacitance be at this frequency? pFarrow_forward
- Help. You decide to use a toaster to toast a slice of bread using the wall outlet of your home. Knowing that the voltage supply of your home is alternating given by the function V = 120 sin (2 πft), where f = 120 Hz and t is time in seconds: 1. If the toaster oven uses nichrome wire that measures a total length of 0. 25 m with a thickness of 0.5 mm (diameter of wire), what is the resistance of the wire when heats up to 100.0 C from room temperature of 20. 0 °C? 2. Knowing the resistance value of the wire from part a) and using Ohms Law, write the alternating current equation. 3. What is the rms value for current and voltage for our toaster oven circuit? 4. How much average electrical energy J does the toaster oven use if you toast your bread for 1 minute?arrow_forwardSome surgery is performed with high-voltage electricity passing from a metal scalpel through the tissue being cut. Considering the nature of electric fields at the surface of conductors, why would you expect most of the current to flow from the sharp edge of the scalpel? Do you think high- or low-frequency AC is used?arrow_forwardLC oscillators have been used in circuits connected to loudspeakers to create some of the sounds of electronic music. What inductance must be used with a 6.7 mF capacitor to produce a frequency of 10 kHz, which is near the middle of the audible range of frequencies?arrow_forward
- Charges on the capacitors in three oscillating LC circuits vary as: (1) q = 2 cos 4t, (2) q = 4 cos t, (3) q = 3 cos 4t (with q in coulombs and t in seconds). Rank the circuits according to (a) the current amplitude and (b) the period, greatest first.arrow_forwardAn L-R-C circuit has the following differential equation: (q = charge on capacitor) ä + 10 à + 100 q = 150 with g (0) = 1 Coulomb and à (0) = 0 amperes %3D a) What is the charge on the capacitor after 0.10 seconds? b) What is the charge on the capacitor after a long time?arrow_forwardAn FM radio station broadcasts at a frequency of 100 MHz. What inductance should be paired with a 10 pF capacitor to build a receiver circuit for this station?arrow_forward
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