Consider an AC series circuit containing a coil, capacitor, and resistor. Doubling the frequency will change the circuit's impedance by what factor?
a. 2.0
b. 1.0
c. 1/2
d. Information is insufficient to determine answer.
[Ques. 2] The density of a certain solid is 7.2 103 kg/m3, and its Young's modulus is 8.0 1010 N/m2 . What is the speed of sound in this material?
a. 1.1 107 m/s
c. 3700 m/s
b. 5900 m/s
d. 3300 m/s
[Ques. 3] Consider an AC series circuit containing a coil, capacitor, and resistor. Doubling the frequency will change the capacitive reactance by what factor?
a. 1.41
c. 2.0
b. 1.0
d. 1/2
[Ques. 4] The speed of sound at 0C is 331 m/s. What is the speed of sound at 32C? (0C = 273 K)
a. 346 m/s
c. 343 m/s
b. 356 m/s
d. 350 m/s
[Ques. 5] Consider an AC series circuit containing a coil, capacitor, and resistor. Doubling the frequency will change the inductive reactance by what factor?
a. 1.0
c. 1/2
b. 1.41
d. 2.0
[Ques. 6] The speed of sound in air is a function of which one of the following?
a. wavelength
c. temperature
b. frequency
d. amplitude
[Ques. 7] An AC series circuit has 8.00-W resistance, 15.00-W inductive reactance, and 10.00-W capacitive reactance. If an effective (rms) emf of 120 V is applied, what is the effective (rms) current value?
a. 26.0 A
c. 9.23 A
b. 5.31 A
d. 12.7 A
[Ques. 8] The frequency separating audible waves and ultrasonic waves is considered to be 20 kHz. What wavelength in air at room temperature is associated with this frequency? (Assume the speed of sound to be 340 m/s.)
a. 0.59 cm
c. 34 cm
b. 1.7 cm
d. 55 cm
[Ques. 9] What is the magnitude of the phase angle of an AC series circuit that is constructed of a 10.0-W resistor along with 20.00-W inductive reactance and 7.00-W capacitive reactance?
a. 18.4
c. 52.4
b. 26.6
d. 59.5
[Ques. 10] Which of the following ranges corresponds to the shortest wavelengths?
a. infrasonic
c. ultrasonic
b. audible
d. All have the same wavelengths.
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