A radio tuner works because
A) the charge sloshes back and forth in the tank circuit at a certain frequency and the station being tuned in to must be very near that frequency.
B) the capacitor dimensions must be the same size as the signal wavelength.
C) the magnetic field in the inductor must be the same size as that of the signal.
D) the electric field in the capacitor must be the same size as that of the radio signal.

Question

Quizplus · Accepted Answer

A radio tuner works by utilizing a tank circuit, where the charge oscillates back and forth at a specific frequency. For the tuner to effectively pick up a radio station, the frequency of the station must closely match the resonant frequency of the tank circuit. This is how the tuner selects or "tunes in to" a particular station among many signals in the air. Choices B, C, and D involve incorrect assumptions about the physical size of components or fields needing to match the signal in ways that are not relevant to how radio tuners function.

A Radio Tuner Works Because