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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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.