Home
Class 8
PHYSICS
Which of the following statements is/are...

Which of the following statements is/are correct regarding artificial satellites?
I. They revolve around the earth much closer than earth's natural satellite.
II.They are used for weather forecasting, long distance communication and remote sensing.
III. They are not used for telecommunication.

A

I only

B

I and II only

C

II only

D

I,II and III

Text Solution

AI Generated Solution

The correct Answer is:
To determine which statements regarding artificial satellites are correct, let's analyze each statement one by one. ### Step 1: Analyze Statement I **Statement I:** "They revolve around the earth much closer than earth's natural satellite." - **Explanation:** Artificial satellites are indeed placed in orbits that can be much closer to the Earth compared to the Moon, which is the Earth's natural satellite. For example, low Earth orbit (LEO) satellites can be as close as 200 kilometers above the Earth's surface, while the Moon orbits at an average distance of about 384,400 kilometers. - **Conclusion:** This statement is **correct**. ### Step 2: Analyze Statement II **Statement II:** "They are used for weather forecasting, long distance communication and remote sensing." - **Explanation:** Artificial satellites serve multiple purposes, including weather forecasting (e.g., meteorological satellites), long-distance communication (e.g., communication satellites), and remote sensing (e.g., Earth observation satellites). They play a crucial role in gathering data for these applications. - **Conclusion:** This statement is **correct**. ### Step 3: Analyze Statement III **Statement III:** "They are not used for telecommunication." - **Explanation:** This statement is incorrect. Artificial satellites are extensively used for telecommunication purposes. They facilitate communication over long distances, allowing for services such as television broadcasting, internet access, and phone communications. - **Conclusion:** This statement is **incorrect**. ### Final Conclusion Based on the analysis: - Statement I is correct. - Statement II is correct. - Statement III is incorrect. Thus, the correct statements regarding artificial satellites are **I and II**.
Promotional Banner

Topper's Solved these Questions

  • SOF NATIONAL SCIENCE OLYMPIAD

    SCIENCE OLYMPIAD FOUNDATION |Exercise ACHIEVERS SECTION |2 Videos

  • SAMPLE PAPER 4 (CLASS VIII)

    SCIENCE OLYMPIAD FOUNDATION |Exercise SECTION C - SCIENCE|3 Videos

  • SOME NATURAL PHENOMENA

    SCIENCE OLYMPIAD FOUNDATION |Exercise ACHIEVERS SECTION (HOTS) |4 Videos

Similar Questions

Explore conceptually related problems

Which one of the following statements regarding artificial satellite of the earth is incorrect

An artificial satellite revolves around the Earth with a constant velocity. It’s the statement true ?

An artificial satellite is revolving around earth. The physical quantity which is conserved is

Which of the following graphs is true for the motion of a satellite revolving round the Earth. ('T" is the time period of a satellite and 'r' is the distance of the satellite from the Earth).