Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 11
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# If More Air is Pushed in a Soap Bubble, the Pressure in It - Physics

MCQ

If more air is pushed in a soap bubble, the pressure in it

#### Options

• decreases

•  increases

•  remains same

• becomes zero.

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#### Solution

Excess pressure inside a bubble is given by:  $P = \frac{4T}{r}$.

When air is pushed into the bubble, it grows in size. Therefore, its radius increases. An increase in size causes the pressure inside the soap bubble to decrease as pressure is inversely proportional to the radius.

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#### APPEARS IN

HC Verma Class 11, 12 Concepts of Physics 1
Chapter 14 Some Mechanical Properties of Matter
MCQ | Q 16 | Page 298
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