Assertion : Plane of space satellite is always equatorial plane.
Reason : On the equator value of g is minimum .

Options

A. If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.
B. If both Assertion and Reason are true but Reason is not the correct explantion of Assertion.
C. If Assertion is true, but the Reason is false.
D. If Assertion is false but the Reason is true.

Explanation

To analyze the given question, we need to evaluate both the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states that "the plane of a space satellite is always the equatorial plane."

- **Evaluation**: This statement is false. While many satellites do orbit in the equatorial plane, there are also polar satellites that orbit over the poles, thus not all satellites are confined to the equatorial plane.

### Step 2: Understand the Reason
The reason states that "on the equator, the value of g is minimum."

- **Evaluation**: This statement is true. The value of gravitational acceleration (g) at the equator is affected by the centrifugal force due to the Earth's rotation. The effective gravitational acceleration (g') can be expressed as:

\[ g' = g - r \omega^2 \cos^2(\theta) \]

At the equator, \(\theta = 0\), thus:

\[ g' = g - r \omega^2 \]

This shows that the effective gravitational acceleration is reduced at the equator due to the centrifugal force, making it the minimum value of g.

### Step 3: Conclusion
Based on the evaluations:
- The assertion is false because not all satellites are in the equatorial plane.
- The reason is true because the effective value of g is indeed minimum at the equator.

Thus, the correct conclusion is: **Assertion is false, but the reason is true.**

### Final Answer
The correct option is: Assertion is false, Reason is true.

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