What frequency range is associated with the designation MF?

The frequency range designated as MF, or Medium Frequency, is correctly identified as 300-3000 KHz (or 0.3-3 MHz). This portion of the electromagnetic spectrum is primarily used for AM radio broadcasting and offers a balance between transmission range and fidelity.

Frequencies within this range are capable of achieving long-distance propagation during nighttime due to their ability to reflect off the ionosphere, as well as good ground-wave transmission during the day. This ability makes MF an essential frequency band for AM radio stations, which typically operate around 540 to 1700 KHz.

Other choices represent different frequency ranges that do not correspond to the MF designation. For example, lower ranges such as 3-30 KHz pertain to the LF (Low Frequency) band, while frequencies exceeding 3 MHz, like those mentioned in the upper options, would fall outside the MF classification. Therefore, the range of 300-3000 KHz is the correct match for the Medium Frequency designation.