Q: Capacitors can be used to filter out low frequencies. for example, a capacitor in series with a sound reproduction system rids it of the 60 hz what?


Read this paragraph and choose the correct option from the provided answers:

the current. Capacitors can be used to filter out low frequencies. For example, a capacitor in series with a sound reproduction system rids it of the 60 Hz hum.

 Choices:

- white noise

- vibration

- echo

- hum


A:
hum