Out of the following , the only correct statement about satellites is

Options

A. A satellite cannot move in a stable orbit in a plane passing through the earth's center
B. Geostationary satellites are launched in the equatorial plane
C. We can use just one geostationary satellite for global communication around the globe
D. The speed of satellite increases with an increase in the radius of its orbit

Answer

To solve the question regarding the correct statement about satellites, we will analyze each of the provided statements one by one.

### Step-by-Step Solution:

1. **Statement Analysis**:
- **Statement 1**: "A satellite cannot move in a stable orbit in a plane passing through the Earth's center."
- This statement is incorrect. Satellites can indeed move in stable orbits in various planes, including those that pass through the Earth's center. For instance, geostationary satellites orbit in the equatorial plane, which is a plane that passes through the Earth's center.

- **Statement 2**: "Geostationary satellites are launched in the equatorial plane."
- This statement is correct. Geostationary satellites must be launched into an orbit that is aligned with the equator to maintain their position relative to the Earth's surface. This allows them to appear stationary from a point on the ground.

- **Statement 3**: "We can use just one geostationary satellite for global communication around the globe."
- This statement is incorrect. A single geostationary satellite has a limited coverage area. To provide global communication, multiple satellites are required to cover different regions of the Earth.

- **Statement 4**: "The speed of a satellite increases with an increase in the radius of orbit."
- This statement is incorrect. According to Kepler's laws and the principles of orbital mechanics, the speed of a satellite decreases as the radius of its orbit increases. The relationship is inversely proportional; as the radius increases, the orbital speed decreases.

2. **Conclusion**:
- After analyzing all four statements, the only correct statement is **Statement 2**: "Geostationary satellites are launched in the equatorial plane."

### Final Answer:
The only correct statement about satellites is: **Geostationary satellites are launched in the equatorial plane.**

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