The range of ground wave transmission can be increased by

Options

A. increasing the power of transmitter with the use of HF
B. increasing the power of transmitter with the use of VLF
C. decreasing the power and increasing the frequency of radio waves
D. decreasing both power and frequency of radio waves

Answer

To solve the question regarding how to increase the range of ground wave transmission, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Ground Wave Transmission**:
- Ground wave transmission refers to the propagation of radio waves along the surface of the Earth. The range of this transmission is influenced by several factors including the power of the transmitter and the frequency of the waves.

2. **Defining Range**:
- The range in this context is defined as the maximum distance over which the transmitted signal can be received with sufficient strength.

3. **Analyzing the Options**:
- **Option 1**: Increasing the power of the transmitter with the use of high frequency.
- **Option 2**: Increasing the power of the transmitter with the use of very low frequency.
- **Option 3**: Decreasing the power and increasing the frequency of radio waves.
- **Option 4**: Decreasing both power and frequency of radio waves.

4. **Evaluating Each Option**:
- **Option 1**: Increasing power is good, but high frequency waves tend to have shorter ranges due to higher attenuation.
- **Option 2**: Increasing power while using very low frequency is beneficial because low frequency waves can travel longer distances and are less affected by obstacles.
- **Option 3**: Decreasing power will reduce the range, so this option is not viable.
- **Option 4**: Decreasing both power and frequency will also reduce the range, making this option incorrect.

5. **Conclusion**:
- The best option to increase the range of ground wave transmission is **Option 2**: Increasing the power of the transmitter with the use of very low frequency.

### Final Answer:
The range of ground wave transmission can be increased by **increasing the power of the transmitter with the use of very low frequency**.

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