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A tennis ball which has been covered with charges is suspended by a thread so that it hangs between two metal plates. One plate is earthed, while other is attracted to a high voltage generator. The ball
  • a)
    hangs without moving
  • b)
    is attracted to the high voltage plate and stays there
  • c)
    swings backward & forward hitting each plate in turn
  • d)
    is repelled by earthed plate and stays there.
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A tennis ball which has been covered with charges is suspended by a th...
Explanation:The plate which connected to high voltage generator induces negative charge on ball which causes attraction. When the ball strikes the positive plate, charge distribution again takes place that is the bass becomes positive and repulsion takes place. When it strikes the plate which connected to earth than its charge goes to earth and again it will be attracted towards positive plate. Hence the ball swings backward and forward hitting each plate in turn.
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Most Upvoted Answer
A tennis ball which has been covered with charges is suspended by a th...
Understanding the Scenario
A tennis ball covered with charges is suspended between two metal plates, one of which is earthed and the other connected to a high voltage generator. The behavior of the ball depends on the electric fields created by the charged plates.
Electric Charges and Forces
- The earthed plate is at zero potential, meaning it can freely accept or donate charges.
- The high voltage plate has a significant positive or negative charge, creating a strong electric field.
Interaction of the Tennis Ball
1. Induced Charges: The presence of the high voltage plate influences the tennis ball. The charges on the ball will rearrange themselves due to the electric field.
2. Attraction and Repulsion:
- If the high voltage plate is positively charged, it attracts negative charges from the ball and repels positive charges, leading to a net attraction towards it.
- Conversely, the earthed plate, being neutral, will attract the positive charges on the ball and repel the negative charges, creating a repulsive effect.
Movement of the Ball
- As a result of these attractive and repulsive forces, the ball will experience a swinging motion.
- The ball will swing back and forth between the two plates, hitting each one in turn, as it is continuously attracted to the high voltage plate and repelled by the earthed plate.
Conclusion
Hence, the correct answer is option 'C': the ball swings back and forth, hitting each plate in turn due to the interplay of electric forces from the charged plates. This demonstrates the fascinating effects of electric fields on charged objects.
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A tennis ball which has been covered with charges is suspended by a thread so that it hangs between two metal plates. One plate is earthed, while other is attracted to a high voltage generator. The balla)hangs without movingb)is attracted to the high voltage plate and stays therec)swings backward & forward hitting each plate in turnd)is repelled by earthed plate and stays there.Correct answer is option 'C'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about A tennis ball which has been covered with charges is suspended by a thread so that it hangs between two metal plates. One plate is earthed, while other is attracted to a high voltage generator. The balla)hangs without movingb)is attracted to the high voltage plate and stays therec)swings backward & forward hitting each plate in turnd)is repelled by earthed plate and stays there.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A tennis ball which has been covered with charges is suspended by a thread so that it hangs between two metal plates. One plate is earthed, while other is attracted to a high voltage generator. The balla)hangs without movingb)is attracted to the high voltage plate and stays therec)swings backward & forward hitting each plate in turnd)is repelled by earthed plate and stays there.Correct answer is option 'C'. Can you explain this answer?.
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