Tension in Strings Inside Orbiting Satellite | Electrostatics + Space Physics | Doubtify JEE

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⚖️ Tension in Strings in Orbiting Satellite – Electrostatics in Space | JEE Physics | Doubtify JEE

💡 Question:

Two identical small bodies each of mass = m and charge = q are suspended from two strings of length = l from a fixed point. The system is taken inside an orbiting artificial satellite.

👉 Question: What is the tension in the strings inside the satellite?

🖼️ Question Image:

Two identical small bodies each of mass = m and charge = q are suspended from two strings of length = l from a fixed point. The system is taken inside an orbiting artificial satellite.

🧠 Solution (Image):

✍️ Detailed Explanation:

In this problem, we need to analyze the behavior of a system of two charged particles suspended from a point while the entire system is in a satellite orbiting the Earth.

🌌 Key Concept – Weightlessness in Orbit:

  • When a system is placed inside an orbiting satellite, it experiences apparent weightlessness.

  • This means gravitational acceleration (g) is effectively zero within the frame of reference of the satellite.

  • Hence, all forces related to gravity like tension due to weight become zero.

⚡ Electrostatic Force Consideration:

  • Since both bodies have charge q, they repel each other.

  • However, because the system is weightless, the only acting force is the electrostatic repulsion, and no tension is needed to counteract weight.

🧾 Final Answer:

✅ Tension in each string = 0

The strings go slack inside the satellite due to zero gravity (weightlessness), and the bodies simply float. Any force between them is purely electrostatic, and no tension is required to balance their weight.

🎥 Video Solution:

🔍 Why This Question Is Important:

  • Tests your understanding of weightlessness in artificial satellites.

  • Connects concepts from Electrostatics and Mechanics.

  • Frequently asked in JEE Advanced theoretical MCQs.

  • Helps clarify real-world physics applications like space science and orbital systems.

🧠 Pro Tip:

Whenever you’re told a system is in an orbiting satellite, immediately remember:

Gravity disappears = Apparent Weight = Zero
This simplifies most problems dramatically!

📩 Have a Doubt?

Mail us at 📬 doubtifyqueries@gmail.com or DM us on Instagram.
Team Doubtify is here to help you, always!

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