Question

Direction - For the below Assertion [As] and Reason [R], choose the correct alternative-
Assertion [As] : Moon cannot be used as a satellite for communication.
Reason [R] : Moon does not move in the equatorial plane of the earth.

• A. Both [As] and [R] are true, and [R] is the correct explanation of [As].
• B. Both [As] and [R] are true, but [R] is not the correct explanation of [As].
• C. [As] is true, but [R] is false.
• D. [As] is false, but [R] is true.

Hint:

A communication satellite must have a stationary footprint over the Earth's surface. Since any orbit outside the equatorial plane has a changing latitude relative to ground stations, the Moon's nonequatorial path makes it structurally impossible to use as a passive continuous communication satellite.

Answer 1

The Correct Option is A

Step 1: Note both claims.
Assertion: the Moon cannot serve as a communication satellite. Reason: the Moon does not move in the equatorial plane of the Earth.
Step 2: Recall what a fixed communication satellite needs.
A geostationary satellite must orbit in about $24$ hours, move west to east, and lie in the Earth's equatorial plane.
Step 3: Check the Assertion.
The Moon's period is about $27.3$ days and its orbit is tilted, so it cannot stay fixed over one spot for steady communication. Assertion is true.
Step 4: Check the Reason.
The Moon's orbit is inclined by roughly $5^\circ$ to the ecliptic and is not in the equatorial plane. Reason is true.
Step 5: Link them.
Lying in the equatorial plane is a required condition, and the Moon fails exactly this condition, so the Reason explains why the Moon is unfit.
Step 6: Choose the label.
Both true and Reason explains Assertion, which is option A.
\[ \boxed{\text{Both [As] and [R] are true, and [R] is the correct explanation of [As].}} \]