Which of the following combinations of circuit components can be used to make a tuner for a radio, to select the desired frequency?
a. fixed capacitor, variable resistor
c. fixed inductor, variable capacitor
b. fixed resistor, variable inductor
d. fixed inductor, variable resistor
Question 2
A sound wave coming from a tuba has a wavelength of 0.674 m and travels to your ears at a speed of 345 m/s. What is the frequency of the sound you hear?
a. 512 Hz
c. 230 Hz
b. 1/517 Hz
d. 1/230 Hz