The AM range of radiowaves have frequency

Options

A. less than 30 MHz
B. more than 30 MHz
C. less than 20000 HZ
D. more than 20000 HZ

Answer

To determine the frequency range of AM radio waves, we can follow these steps:

### Step-by-Step Solution:

1. **Understand AM Radio Waves**:
- AM stands for Amplitude Modulation, which is a method used to encode information in a carrier wave by varying its amplitude.

2. **Identify the Frequency Range**:
- The frequency range for AM radio waves is typically between 540 Hz to 1600 kHz.

3. **Convert kHz to Hz**:
- Since 1 kHz = 1000 Hz, we can convert 1600 kHz to Hz:
\[ 1600 \, \text{kHz} = 1600 \times 1000 \, \text{Hz} = 1,600,000 \, \text{Hz} \]
- Therefore, the frequency range in Hz is from 540 Hz to 1,600,000 Hz.

4. **Determine the Maximum Frequency in MHz**:
- To express the maximum frequency in megahertz (MHz), we convert:
\[ 1,600,000 \, \text{Hz} = \frac{1,600,000}{1,000,000} \, \text{MHz} = 1.6 \, \text{MHz} \]

5. **Compare with 30 MHz**:
- Since 30 MHz is equal to 30,000,000 Hz, we can see that the entire range of AM radio frequencies (540 Hz to 1.6 MHz) is indeed less than 30 MHz.

6. **Conclusion**:
- The frequency range of AM radio waves is less than 30 MHz.

### Final Answer:
The AM range of radio waves has a frequency from 540 Hz to 1600 kHz, which is less than 30 MHz.

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