PYQ NEET- Thermal Properties Of Matter

2018: A metal ball is suspended from a thread in a vacuum chamber. The ball is heated with a flame and its temperature is raised to $T$ K. The tension in the thread will increase (A) increase (B) decrease (C) remain the same (D) become zero.

The answer is: (A)

Explanation:

The tension in the thread will decrease as the ball is heated. This is because the ball will expand as it heats up, which will cause the thread to slacken. The greater the temperature of the ball, the lesser the tension in the thread will be.

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