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  3. RAJASTHAN ­ PET

RAJASTHAN ­ PET Rajasthan PET Solved Paper-2006

  • question_answer
    The surface tension of soap bubbles is 0.03 N/m (both surfaces). The excess pressure inside a soap bubbles of diameter 30 mm is

    A)  2 Pa             

    B)  8 Pa

    C)  16 Pa            

    D)  10 Pa

    Correct Answer: B

    Solution :

     The excess pressure\[=\frac{4T}{R}\] \[=\frac{4\times 0.03}{\frac{30}{2}\times {{10}^{-3}}}\] \[=8\text{ }Pa\]


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