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Statement I: A hydrogen-filled balloon s...

Statement I: A hydrogen-filled balloon stops rising after it has attained a certain height in the sky.
Statement II: The atmospheric pressure decreases with height and becomes zero when the maximum height is attained.

A

Statement I is true, statement II is true and Statement II is a correct explanation for Statement I.

B

Statement I is true, Statement II is true and Statement II is NOT the correct explanation for Statement I.

C

Statement I is true, Statement II is false.

D

Statement I is false, Statement II is true.

Text Solution

Verified by Experts

The correct Answer is:
C
When air displaed by the balloon is greater than its weight, then an upthrust is applied on it upwards and it rises. But at a certain height it stops rising because at that height the atmospheric pressure becomes equal to the upthrust applied on it.
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