(A) : The maximum range of coverage by the ground wave propagation is limited up to a few MHz.
(R) : The attenuation of ground wave increases very rapidly with frequency.

Options

A. Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'.
B. Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'.
C. A' is true abd 'R' false
D. A' is false and 'R' is false

Answer

To analyze the statements given in the question, we will break down each statement and evaluate their validity.

### Step 1: Understanding Ground Wave Propagation
Ground wave propagation refers to the transmission of radio waves along the surface of the Earth. This type of propagation is effective at low frequencies, typically below a few MHz.

### Step 2: Evaluating Statement (A)
**Statement (A): The maximum range of coverage by ground wave propagation is limited up to a few MHz.**
- This statement is **True**. Ground wave propagation is most effective at lower frequencies (below a few MHz), which allows for longer distances of coverage. As frequency increases, the effectiveness of ground wave propagation diminishes.

### Step 3: Evaluating Statement (R)
**Statement (R): The attenuation of ground wave increases very rapidly with frequency.**
- This statement is also **True**. As frequency increases, the ground wave experiences greater attenuation due to factors such as increased absorption by the ground and other environmental factors. This means that higher frequency waves lose strength more quickly than lower frequency waves.

### Step 4: Analyzing the Relationship between (A) and (R)
- Both statements (A) and (R) are true. The limitation of the coverage range of ground wave propagation to a few MHz is indeed due to the rapid increase in attenuation with frequency.

### Conclusion
Both statements are true, and statement (R) provides a valid reason for the assertion made in statement (A).

### Final Answer:
(A) is true; (R) is true; (R) is the correct explanation for (A).

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