3-30 MHz frequency range is known as

Options

A. HF
B. VHF
C. UHF
D. MF

Answer

To determine what the 3-30 MHz frequency range is known as, we can follow these steps:

### Step 1: Understand the Frequency Ranges
We need to know the different frequency ranges and their classifications. The common classifications are:
- **High Frequency (HF)**: 3 to 30 MHz
- **Very High Frequency (VHF)**: 30 to 300 MHz
- **Ultra High Frequency (UHF)**: 300 to 3000 MHz
- **Medium Frequency (MF)**: 300 to 3000 kHz

### Step 2: Identify the Given Range
The question specifically asks about the frequency range of 3 to 30 MHz.

### Step 3: Match the Given Range to the Classifications
From our understanding of the frequency classifications:
- The range of 3 to 30 MHz corresponds exactly to the High Frequency (HF) classification.

### Step 4: Conclude the Answer
Thus, the 3-30 MHz frequency range is known as **High Frequency (HF)**.

### Final Answer:
**High Frequency (HF)**

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